A truly free society will require small, cheap chip fabs. If we have to trust a chipmaker, then there's always a backdoor. Chips need not be the most cutting edge - if we can print up 10 mb on a card that fits into a slot, then we have infinitely scalable sovereign computing. The bar is low. But we can't even do that. That was one of my first questions after I understood bitcoin... We're totally dependent on backdoorable stuff even for that unimpressive level.
Discussion
Energy proliferating will help. And AI can help. Ideally the robots build it.
Ehhh. I don't want robots building my shit. I want amazing tutorials that show me every tiny detail, and I get all the skills myself, and it doesn't matter if it takes me years to build a thing because if I can do it once, I can do it again.