In the past, a small number of European cities or municipalities have tried to move away from proprietary software, but those have been isolated cases, lacking broader support.

This time, things look different. Anecdotally, more people in Europe now suddenly actually care about this. They no longer want their governments to rely on software controlled by US companies, because they no longer trust it. Many are shocked and upset about recent US actions that they view as "detestable," including "irrational efforts against NATO," "nonsensical tariffs against allies," "ICE raids that trample over human rights," and "missiles targeting boat survivors." I'm paraphrasing what others have mentioned to me here. Whether you agree or disagree with these concerns, they are valid for many Europeans. They don't particularly care for the open-source movement on its own, but they now view open-source software as a more desirable alternative.

In an ironic twist of fate, the US government's actions could end up causing long-term damage to US tech companies.

This is all based on anecdotal evidence, so I could be wrong, but I have to call it like I see it.