Elon didn’t start a new social network, he took over Twitter. You don’t need to start a new city, you can take over existing ones by just moving there en masse and voting for your candidates. You don’t even need 44b. This is hard to do, but it’s easier than moving all the intellectual capital out of SF. Network effects are hard to disrupt.

Haven't there been a few massive disruptions of network effects before? Ex: Michican manufacturing

I do also think trying to "take it back" is worthwhile