I’m a little bit sceptical to this. My background is in distributed systems. So i known this is possible on paper.

long autistic rant about sequential distributed computation, consensus and data distribution omitted for brevity

Regardless of the difficulty its mostly a question of finding the right nodes to “nest” in. American legislation will not affect the rest of the world, this will just stop it from happening in one location and if we stopped sharing AI models tomorrow the ones already out there would be able to make this given enough time or someone would build it without AI. I don’t really see how any of this could be blocked.