I love these ideas but self hosting is simply not a solution for average citizens who aren’t skilled at such things. To them it would be like paving their own highway with bridges and also maintaining and policing them. It might be easy for you and me, but that’s because we have training and experience and we chose this way. It’s not a justifiable opportunity cost for most people.
I think a different kind of org than the googles metas and Microsofts of the world is in need, like a compute & communications co-op that can actually compete on that level of capability offerings, accessibility, performance and security.