You are missing the big picture who develops them, pays the salaries of people in the trenches, implement LSPs, and whatever else around the ecosystems.

Example, Java, .NET, Go and co are FOSS, how long do you think they will keep on going without their overlords?

For complete alternatives we need to go back to the cold war days, where programming languages were driven by vendor neutral standards, and there were several to buy from.

As it is, it suffices to take the air out of existing FOSS options.

Even if you quickly point out to GCC and clang, one reason why they have dropped implementation velocity from existing ISO revisions is due to a few well known big corps focusing on their own offerings, while other vendors seldom upstream stuff as they focus on clang.

EDIT: As I missed this on the first comment, same applies to the big FOSS OS projects, most contributions to the major Linux distros, or the BSDs come from non European companies, there is naturally something like SuSE, but then we get into the whole who is allowed to contribute, security, backdoors and related stuff.

For the OS stuff wouldn't a European distribution of Linux do. Worst case if Europe could no longer get access to patches it could fork it. OK Europe might get behind, but that doesn't seem like an immediate issue, in the same way that not having AWS would be?

On programming languages it is a concern how popular .net and Java are in Europe. However being stuck on the current state of Python is less of a worry. I feel like I was always 10 years behind on needing new features.

Edit: I concede my .net concerns do pull through to Linux. If you were selling Linux solutions to Government or big business, I fear Redhat might be chosen before Suse and Ubuntu

Yeah, it would be a matter who would pick up the forks so to speak.

The EU is asking for information on how to support open source, as they currently do through NLNET. It seems to prefer decentralised open source to the hyper-capitalism we got from American tech. Both have their downsides, of course.

People are still running on Java 1.8, which was released in 2014. If no more Java work happened, that'd be unfortunate, but realistically we'd all be fine.

A lot of European people spend their energy on those FOSS languages. Why would they go away?

There's C++ if you want something that has an international standard.

Yes that would be one of them.