Seizing the 100 biggest companies seems like a good way for the government to end up running a lot of things it doesn't actually want to be responsible for running, and by extension end up just running those things directly into the ground or selling them off to be privatized again

There are things I think make a compelling argument for seizing, but not based on size, that seems like an awful idea. I live in NC, where there's one company that provides power giving them a local monopoly. Also they love fracking. Duke Energy can go suck a dick. THAT kind of situation makes a strong case for seizing private entities and making them publicly funded infrastructure. Also taxpayers have funded so much internet infrastructure that we never actually got, that should probably also be national infrastructure 😅