Everyone did move further from SF. That's where all the bay area sprawl came from. That farm land got filled in with housing, so now there's not much countrysid

Everyone did move further from SF. That's where all the bay area sprawl came from. That farm land got filled in with housing, so now there's not much countryside anymore. People then moved even further away, causing the sprawl to spread out even more. We're well on our way to being a giant low density megacity as a result.