And people wonder why the cost of anyplace to live here is so high; you really can’t build ‘up’ in SF very easily, and you can’t build ‘out’ because the bay is already too filled in and the fill is potential quicksand.
If you will excuse my little correction, your big problem is that you are built on a big, hulking set of plate edge related faults. Of course, you are correct about the joys of building on a fill soup. It’s going to be a tragedy.