So the only solution is a even higher population density?
https://en.wikipedia.org/wiki/List_of_United_States_cities_b...
Automobile-based suburban sprawl is the only functional development pattern in the US because we’re so bad at building and maintaining public transit systems.
* A desirable place to live
* No growth
* Affordable
And for growth, you get to pick a mix of growing out, in and up. San Francisco proper obviously can't sprawl, so it needs to grow in and up. And the surrounding suburbs need to start doing their part too.