A Massive Migration of 2.5 Million People! Can *Linux* Really Replace Windows?

Against the backdrop of Europe’s continued emphasis on digital sovereignty, France has this time put forward a more concrete implementation plan rather than staying at the level of slogans. Reports show that the French government has formally committed to replacing Microsoft Windows with Linux on all government desktop computers, affecting about 2.5 million civil servants. In terms of sheer scale, this is no longer a routine system upgrade, but more like a reconstruction of public digital infrastructure.

From a design perspective, France’s goal is not merely to swap out one operating system interface for another, but to rebuild the entire dependency chain along with it. All ministries are required to submit replacement plans by autumn 2026, covering collaboration tools, antivirus software, AI platforms, databases, and network equipment. This indicates that replacing Windows with Linux is only the surface-level move; the real focus is on bringing the underlying environment, data flows, and service hosting rights back under local control as much as possible. It is somewhat like a second-generation product shifting from contract manufacturing to in-house development: the costs are higher, but so is the level of control.

Earlier this year, the French government also required all departments to replace American video conferencing platforms by 2027 with the domestic Visio platform hosted on local servers. Taken together, the logic behind these two policies is highly consistent: reduce strategic dependence on external tools and external infrastructure, while keeping the boundaries of data security as much as possible in its own hands. Objectively speaking, this line of thinking is not new. European countries such as Germany and the UK have previously explored similar paths, including replacing Windows with Linux and Microsoft Office with open-source Office alternatives.

But similar cases have repeatedly shown that replacement is never as simple as downloading a new system. As the original text already mentions, the real difficulties lie in office workers’ usage habits and software compatibility, especially Office document formats, legacy departmental systems, custom plugins, and cross-department collaboration workflows. These kinds of issues often do not become fully visible during the launch phase, but instead turn into maintenance and training costs over the following years—much like a first-release product that appears complete at launch, only for its reputation to be worn down later by mid- and long-term adaptation problems.

If judged purely by “cost-effectiveness,” this move by the French government may not be the cheapest short-term option. Migrating a desktop environment for 2.5 million people will involve substantial upfront investment, training, staffing support, and ecosystem replacement, and may even cost more than simply continuing to renew the Windows ecosystem. But in the medium to long term, once a domestic toolchain and server infrastructure gradually take shape, bargaining power, security boundaries, and controllability will all improve. This is also the biggest difference between government departments and ordinary businesses: the former place greater value on sovereignty and sustainability, rather than on whether the annual IT budget looks good on paper.

So what makes this worth watching is not whether “Linux can be installed,” but whether France can bring the entire office ecosystem along with it. If it only completes the desktop replacement, the impact will be fairly limited; if collaboration, meetings, databases, and security systems all switch in sync, then it will carry real demonstration value for Europe’s public sector. For Microsoft, this may not be an immediately crippling loss, but it does remind all platform vendors of one thing: when customers shift from buying software to buying autonomy, the rules of competition have already changed.