I don't know about SF, but it certainly didn't stick in London (UK) post the dotcom bubble. Many people ended up either with no work in tech or taking voluntary pay cuts, and the hourly rates for contractors dropped dramatically only to get back to previous levels in GBP terms 10 years later. Many tech workers left London because they couldn't afford to live there any more. New properly developments around certain parts of London didn't find tenants, rents dropped making it more attractive to buy a few years later.
