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It's true, the center of gravity shifted to the city about when Pinterest and Stripe moved. But SF-as-SV isn't quite the same as Peninsula-as-SV was. SV on the Peninsula was pragmatic, understated, and apolitical. None are words you'd use to describe SF.
The shift of SV was one of those cases, common in history, where the invader is the one who ends up being conquered. SV was captured by SF culture by moving there, just as the Romans who decamped to Constantinople were eventually captured by Greek culture.
