I think your second point is really the crux of the matter. Even an independent GitHub controls far too much of the ecosystem. There’s really no way around that

I think your second point is really the crux of the matter. Even an independent GitHub controls far too much of the ecosystem. There’s really no way around that in the current situation. Had they followed a similar path as Gitlab, we might not be having this discussion (regardless of an acquisition). Sourceforge is an obvious point here.