That's a counterfactual. Yeah, maybe Shockley's project happened elsewhere it Silicon Elsewhere could have happened somewhere else. But it didn't happen elsewhere. But you are assuming that it would have catalyzed elsewhere. For example, it could have catalyzed in Murray Hill, New Jersey after the transistor but it didn't.
Anyways, people are always leaving the Bay Area. If you came here five years ago, first you were new here and second, you've known people who have left.
So Keith Rabois left for Miami. Great for him. The question is whether the next Keith Rabois will spring forth from Miami. Unlikely.