Linux Just Did Something Windows Has Never Been

Added: 2026-05-11

[00:00:00]In the summer of 2012, engineers at the National Aeronautics and Space Administration sat down and made a decision that on the surface seemed like a minor internal IT matter. They were going to switch the operating system on the International Space Station. The laptops running mission-critical systems 400 km above the Earth's surface, the machines responsible for monitoring life support, crew safety, and orbital positioning were being moved away from Windows.

[00:00:23]NASA's reasoning was blunt and unambiguous. They needed an operating system that was, in their exact words, stable and reliable. They chose Linux, not Mac OS, not a custom-built NASA system. Linux, the same operating system that a Swedish teenager could download for free on a Tuesday afternoon and install on a 10-year-old laptop. And the moment those ISS computers rebooted into Linux, they joined a list so staggering in its scale that most people, when they first hear it, assume someone is exaggerating. They are not. Right now, every single one of the world's 500 fastest supercomputers runs Linux. Not 490 of them, not 498, all 500, the complete list. From the Frontier supercomputer in Tennessee, currently the most powerful computing machine ever built by human beings, capable of executing over a quintillion mathematical operations every single second, all the way down to number 500 on that list, Linux is the operating system running the show. Windows has never appeared on that list, not once.

[00:01:21]Not at any point in the history of supercomputing rankings. This is not a recent development that Microsoft is scrambling to respond to. This is a permanent structural reality that has been locked in place for nearly a decade. Linux dominates the absolute pinnacle of human computing, and Windows has never been invited. But that is only where the story starts.

[00:01:40]Because what Linux just achieved goes far beyond supercomputers and space stations.

[00:01:44]It has crossed a threshold that nobody in the technology industry genuinely believed was possible 15 years ago. For the first time in computing history, a single operating system built by volunteers, maintained by a global community of engineers who have never all been in the same room together, and available to anyone on Earth for free, now runs more active devices than any other software platform in human history.

[00:02:06]The number attached to this achievement is approximately 3.9 billion. That is not the number of Linux installations, that is the number of active devices running Linux right now, today, as you read this.

[00:02:17]That is more than the entire population of the Americas, Europe, Africa, and Australia combined. All holding a Linux-powered device in their hand simultaneously. And Windows, despite 50 years of corporate investment, despite billions of dollars in development budgets, despite the most aggressive software licensing strategy in the history of the technology industry, has never come close. Do you understand how this happened? You need to go back to a decision made in 2005 by a Finnish software engineer named Linus Torvalds.

[00:02:45]He had created the Linux kernel in 1991 as a personal project. A 21-year-old student who wanted a free version of the Unix operating system for his own computer.

[00:02:53]What he built in his bedroom in Helsinki would eventually become the foundation of the modern digital world. But in 2005, Torvalds made a specific architectural decision about how the Linux kernel would handle updates. A decision so consequential that its effects are still playing out in data centers, research labs, and military installations across the planet today.

[00:03:12]He designed Linux to be updated, patched, and fundamentally modified while it was running.

[00:03:17]Without stopping, without rebooting, without the system ever going offline.

[00:03:22]This is called live kernel patching.

[00:03:24]And Windows 10 cannot do it. Think about what that actually means in practical terms. Every time Microsoft pushes a critical security update to Windows, the machine receiving that update has to stop. It has to close its processes, apply the patch to the kernel, and restart from scratch.

[00:03:39]For a home user, this is an annoyance.

[00:03:41]Your laptop freezes for 8 minutes on a Thursday evening, and you miss the beginning of something you were watching. Mildly irritating.

[00:03:47]For a hospital running patient monitoring systems, it is a scheduled maintenance window that introduces vulnerability. For a stock exchange processing 2 million transactions every minute, it is a logistical nightmare requiring coordination across hundreds of systems.

[00:04:00]For a military communications network in an active theater of operations, it is a gap in capability that an adversary can plan around. The New York Stock Exchange runs on Linux. The London Stock Exchange runs on Linux. The Tokyo Stock Exchange runs on Linux. These are not small organizations making casual technology choices. They are institutions where a single second of downtime translates directly into financial losses measured in millions of dollars and legal liability that can last for years. They chose Linux specifically because of its ability to stay running, to accept updates and patches while continuing to process transactions, to be maintained without ever having to stop. Linux-based servers routinely post uptime records of 5, 6, 7 years of continuous operation without a single reboot. The record for a Linux server running without interruption stands at over 17 years.

[00:04:46]Windows Server, by design, cannot approach this. The architecture does not permit it. The financial markets alone tell you something profound, but they are a fraction of the infrastructure story. 96.3% of the world's top 1 million web servers run Linux. When you open a browser and type in the address of almost any website on Earth, the machine that receives your request and sends back a response is almost certainly running Linux. Google's servers run Linux. Amazon's servers run Linux. Facebook's servers run Linux.

[00:05:13]The overwhelming majority of cloud infrastructure, the invisible plumbing that carries the entire modern internet, runs on Linux. And the most extraordinary detail in all of this is that Microsoft itself, the company that created Windows and spent 20 years insisting it was the superior operating system for enterprise computing, has now publicly acknowledged that more than half of the virtual machines running on its own Azure cloud platform, its own product, run Linux.

[00:05:37]Microsoft built a cloud and then quietly filled it with its competitors' operating system because the workloads that matter most demanded it. This is not a minor admission. This is a corporation worth over $3 trillion conceding in infrastructure terms that it lost. Not in the boardroom, not in press releases, in the server racks where it actually counts.

[00:05:56]Now, for decades, one argument remained standing in Windows' defense, gaming.

[00:06:01]The personal computer gaming industry, worth over $40 billion annually, had been built almost entirely on top of Windows. Game developers wrote for DirectX, Microsoft's graphics programming interface. Hardware manufacturers optimized their drivers for Windows.

[00:06:15]The entire ecosystem, from major studio releases to independent developers, assumed a Windows user at the other end.

[00:06:21]If you wanted to play games on a computer, you bought a Windows computer.

[00:06:24]This was not a preference, it was an infrastructure reality. Linux simply did not have the compatibility, the driver support, or the gaming library to compete. For most of the 2010s, fewer than 1% of Steam users, the world's largest PC gaming platform, played their games on Linux. Then Valve Corporation did something nobody expected.

[00:06:44]In 2020, Valve's engineers released Proton, a compatibility layer built on top of an open-source project called Wine, which allowed Linux systems to run Windows games without those games ever being ported or modified for Linux. A Windows game, untouched by any Linux developer, could now run on a Linux machine through Proton with performance that, in many cases, matched or exceeded native Windows performance. In benchmark tests conducted independently in 2023, games running through Proton on Linux outperformed the same games on Windows 11 in a significant number of tested titles. The compatibility layer was, in some measurable cases, faster than the system it was designed to emulate. And then in 2022, Valve released the Steam Deck, a handheld gaming computer running Steam OS, which is a Linux-based operating system, with access to a library of over 50,000 games through the Steam platform.

[00:07:34]It sold out within hours of launch. It received near universal critical acclaim. By 2024, Linux's share of the Steam user base had crossed 4%, a number that sounds small until you calculate what 4% of Steam's active user base of about 132 million people actually represents. That is over 5 million dedicated gaming users on Linux, a figure that would have been dismissed as fantasy a decade ago. More consequentially, Proton has now validated over 20,000 Windows games as fully playable on Linux without modification.

[00:08:03]Windows' last remaining cultural stronghold, the argument that serious gamers simply could not exist on Linux, had been systematically dismantled game by game, benchmark by benchmark. But perhaps the most philosophically significant achievement in Linux's recent history is not about market share or benchmarks or server uptime. It is about what Linux has done to the nature of software itself.

[00:08:24]The Linux kernel, the core of the operating system, is maintained by a community of approximately 15,000 active developers across 200 countries. It has accumulated over 30 million lines of code. In 2024, it received contributions from engineers employed at companies including Google, Intel, Samsung, Red Hat, IBM, and Huawei, all competing commercial organizations who simultaneously cooperate on building the same foundational software. This is a model of development that has no parallel in software history, and certainly no parallel in the history of Windows, which has always been a closed system developed by a single company under commercial secrecy. The result of this open collaborative model is a security architecture that has proven fundamentally more resistant to large-scale exploitation than Windows.

[00:09:09]This is not an ideological claim. It is an observable pattern in security data.

[00:09:14]The Wanna Cry ransomware attack of 2017 infected over 200,000 Windows computers across 150 countries in a single weekend, causing estimated damages of $4 billion and crippling the National Health Service in the United Kingdom.

[00:09:27]Linux systems were not affected. The NotPetya attack in the same year, described by the White House as the most destructive and costly cyber attack in history, targeted Windows infrastructure specifically and caused damages estimated at over $10 billion.

[00:09:41]The reason Linux is not targeted at the same scale is partly market share and partly something deeper.

[00:09:46]The open nature of Linux's code means that security vulnerabilities, when they exist, are typically identified and patched by the global developer community before they can be weaponized at scale. The code is visible to everyone, which means the vulnerabilities are visible to everyone, which means they get fixed. Windows, by contrast, operates as a closed system.

[00:10:05]Its vulnerabilities exist in the dark, discoverable by researchers and criminals alike, but patchable only by Microsoft engineers on Microsoft's timeline.

[00:10:13]The Ingenuity helicopter, the first powered aircraft to fly on another planet, flew on Mars in April 2021. It ran Linux. The Perseverance rover it landed alongside runs Linux. When scientists at JPL in California needed an operating system reliable enough to function autonomously on a planet where the communication delay makes real-time human intervention impossible, where a software crash cannot be fixed by a technician in the building, where the machine simply has to keep working without anyone watching over it, they chose Linux. They did not choose Windows. They did not even seriously consider it. That choice, made by engineers whose professional lives depend on getting it right, tells you everything you need to know about the quiet structural revolution that Linux has been executing for 30 years.

[00:10:52]Android, which is built on the Linux kernel, now runs on approximately 72% of all smartphones on Earth. That is roughly 3.3 billion active Android devices globally. Every time someone in Lagos checks their bank balance, every time a factory worker in Shenzhen clocks into their shift, every time a farmer in rural India receives a weather alert on a $40 smartphone, they are running Linux. They will never know it. The word Linux will never appear on their screen, but the kernel underneath everything, the invisible foundation managing their memory, their battery, their network connection, their camera, is Torvalds's code, descended in a direct line from the bedroom in Helsinki in 1991. Windows Mobile existed. Windows Phone existed.

[00:11:32]Microsoft spent billions trying to build a mobile operating system and capture this market. By 2017, Windows' global smartphone market share had fallen to 0.1%.

[00:11:41]By 2019, Microsoft had abandoned the effort entirely. The mobile computing revolution, the largest expansion of computing access in human history, happened entirely on Linux. Windows was not part of it. And yet, the majority of people reading this right now are doing so on a Windows machine on their desk or on their laps. It's a device that cannot update its own kernel without rebooting, that has never run a supercomputer, that plays games on an ecosystem that Linux is steadily learning to replicate, that shares its server market with a competitor that its own creator has been forced to accommodate. Windows remains dominant on the personal desktop. Its market share there, hovering around 72%, is real and substantial and not collapsing overnight. But, dominance on the personal desktop in 2025 is the consolation prize.

[00:12:25]The computing that shapes the world, the supercomputers modeling climate change and designing new pharmaceuticals, the servers processing financial transactions and hosting the internet, the infrastructure running artificial intelligence models that are beginning to reshape every industry on the planet, the spacecraft exploring other worlds, the phones in the hands of 3 billion people who have never owned a desktop computer.

[00:12:45]All of it runs on an operating system that a student built for free because he wanted something better. Linux did not win by competing with Windows on Windows' terms. It won by becoming so deeply embedded in the infrastructure of modern civilization that asking whether Windows could replace it is roughly equivalent to asking whether someone could drain the ocean and replace it with a different body of water.

[00:13:05]The concrete is already poured. The kernel is already running. The only question left is whether most people will realize it before or after Linux quietly takes everything else.