Not to mention local talent and experience pools, which are what almost everyone overlooks when they talk about a "new silicon valley" popping up someplace else

Not to mention local talent and experience pools, which are what almost everyone overlooks when they talk about a "new silicon valley" popping up someplace else, be that Berlin or London or whatever. Those places simply don't have the people or the culture to build a thriving tech scene at the same scale and velocity that SV does.