Personally, I hope Silicon Valley maintains its backward nimby-ism so the rest of the country can benefit from some of the proliferation of tech companies.
I would happily take a deal where all the advertising tech companies leave, and only the hardware companies remain (remember why it was originally called silicon valley, not adtech/web/social/... valley).
I wouldn't be surprised if the opposite happened first.
I'm not sure whether you're being sarcastic, but more geographic diversification in the tech industry would be a good thing for the country as a whole.