Because Florida? Unless there is some island of sanity lurking in central Florida that I don't know about (and yes, I have been to St. Pete a number of times due to having family there), it's difficult to look past the massive increase in Dealing with Crazy People that would follow a move from SF to there. I actually like Florida (probably a lot more than your average Bay Area denizen) but the lifestyle tradeoff is a lot more complex than you are making it out to be.