It's not so much that Europe wants to ditch US tech.
It's more that everyone wants to ditch the current crop of leeching billionaires and their spyware products. It's just they all happen to be in the US which given its current administration is a problem.
However this push to use more open source and locally based alternatives proceeds Donald Trump's first term. It's just his rhetoric has accelerated the process.



You would have the same trouble Microsoft did though. No one wanted to use the Windows mobile because there were no apps for it, and there were no apps for it because no developers wanted to develop for a platform with no users. Chicken and the egg.
It would be nice to have a smartphone that was just web-based and didn't really have apps, but I think that ship has sailed, people are just used to the concept and I think they would think of it as a step backwards if they had a phone that didn't use apps.