From an applications point of view: They want web apps only running in whatng cartel web engines? libreoffice? A massive piece of software you can build only with US c++ compilers (MIT and mostly apple)? (the mistake was to use c++ in the first place, well computer languages on an insane level of complexity). To put it together: it won't be perfect, lines for compromises will have to be drawn, and it will feel like g…
Who cares if a piece of open source has American maintainers? The point is not to avoid touching anything American. It is control and sovereignty.
It is much cheaper and easier to have control and sovereignty on less complex software, including the SDK.
Usually you get developer lock-in via non-pertinent complexity, often including the SDK namely the computer language.