Germany just plain dumped Windows (All of German Gov.) for Linux.
Kinda but also no...
One state within Germany (Schleswig-Holstein) has ditched MS in favour of Linux (two years ago, in fact). This follows a period of about a decade where the Munich city government was a Linux shop, and a little more recently with Lower Saxony. The French police have long flirted with having an independent Linux distro for their uses. The UK government for a while mandated that all documents on their website be in OpenDocument formats (rather than MS variants) as well as HTML and PDF... then promptly forgot and continued issuing Excel spreadsheets.
There currently isn't, nor has there ever really been, a comprehensive, managed review of software use across all EU (and EEA and allied) member states and legislatures to consider whether the money spent on COTS software couldn't be more productively used to sponsor FOSS alternatives instead.
Meanwhile, MS sales reps are definitely hardworking as they somehow convinced both Munich and Lower Saxony to make at least partial returns to the Redmond fold.
Hardly an ascendancy.
Potentially the only good thing I can find about our current administration is that they might accidentally force much wider adoption of Linux.
Indeed. The messy wheels of supranational entities like the EU (and EEA and allied) turn slowly. Schleswig-Holstein has made a rather precipitous jump, hoping that they can replicate Munich's relative success in the noughties and wean themselves off MS cold turkey. Other parts are taking a rather more considered and heterogeneous view of their software environment.
This is something that President Trump kicked off by enacting the CLOUD Act in direct opposition to the EU GDPR during his first term. Where the GDPR provides strict rules on data sovereignty, privacy, access, and offshoring, the CLOUD Act allows the US to compel US companies to share cloud data wherever in the world it's physically being stored. (This was actually a hostile act on the part of the US).
So what has been happening is that some EU member states (and others around the world) have been looking at their digital infrastructure and red lights are flashing: because they were reasonably good, reasonably cheap, reasonably accessible, reasonably ubiquitous, and available on very competitive terms, nations have been adopting US cloud infrastructure, US software and US services, often ahead of home grown versions. That means that the US ultimately controls huge amounts of critical and sensitive foreign infrastructure. As money chases money, the more nations did this, the more investment US businesses could make to make their service offerings into something clearly superior to the alternative.
And that's fine when the US administration is a rational custodian of the rules-based international order. President Trump is... less predictable... and that has started to focus attention (here, with Austria leading the way) on why we've all been selecting e.g. Azure over OpenStack, and why MS, IBM, Amazon, and the like get first pick of their nation's digital infrastructure contracts when home grown companies unencumbered by hostile legislation exist.
Navigating that is tricky - foreign companies can buy national ones. Workers can leave. FOSS is inherently a worldwide endeavour. We in Europe will still rely on others for semiconductors and finished microchips: a capricious and protectionist president may restrict our access to these if we don't buy the software to go with it.
That said, slowly but surely, our software environment will move from a monoculture to a flower meadow. And Linux will still not be ascendent.
