Because you might make it big? Seriously though, I just left Seattle after 7 years to move to Madison, WI, for a very interesting opportunity to work on some cool virtualization and orchestration tech. My current company is great, but it's largely a coincidence that it's based in Madison, WI (most of the leadership is on the West Coast). While I'm grateful to be working on something cool right now, I'm painfully aware that there isn't anything else in Madison after my time with my current company is up. Hopefully that's a while, but, software being software, the nature of engineering is very project based. We work in an exceptionally stable industry, but the companies within that industry are not stable at all. I'm definitely getting a strong sense of why someone would want to live near a tech epicenter now that I've left one.