Shuttle busses allowed techies to live in SF and work in places like Google, Facebook, etc. Prior to shuttles, it was a huge pain to do the commute. As they l

Shuttle busses allowed techies to live in SF and work in places like Google, Facebook, etc. Prior to shuttles, it was a huge pain to do the commute. As they left big tech companies, they faced the choice of doing the commute again, or joining/starting companies in SF. I think this is an underrated factor.