As someone who grew up in the Bay Area, but moved to Portland about three years ago, I can tell you there is a stark difference in ecosystems. However, if you are a young up-and-coming programmer coming out of school, it makes complete sense to move to the Bay Area. If you're an Actor you move to L.A. to get your big break. If you're a programmer, you go to the Bay Area to work for a big firm that will help build your reputation and resume. For people later in their careers who have "been there/done that" it's less about what you can do for a company and more about what you can do for yourself. People later in their career tend to think more about their quality of life after spending years grinding it out in markets like the Bay Area. I know it's the big reason I moved to Portland. I love the tech community here. It's much more collaborative. The salaries may not match what you get in the Bay Area, but what I lose in salary I gain in not being stressed all the time.