Sadly, a startup (thredup.com) that I worked for did too and I decided not to join them, mostly because I had reached a point in my life where uprooting to the opposite coast was unfortunately no longer an option (and I had already spent 4 years in a previous life in Cali)...
Boston should have been Silicon Valley. It had all the pieces, everything aligned, best of the best. But it's not. I think there's a really good argument to be made that this conservatism is why. All the really smart people ran away first chance they got.