I was surprised that the risk of a large earthquake was not mentioned in the article. Having lived in SF for over a year and experienced two relatively minor 4.

I was surprised that the risk of a large earthquake was not mentioned in the article. Having lived in SF for over a year and experienced two relatively minor 4.0 earthquakes, this is a real risk and one that suggests it doesn't make sense to pack the city with large, high rise buildings. SF is also a city of extremes - it contains the richest people in the world and the poorest people. Something really need to be done about the large mentally ill population before SF can be considered a truly forward looking city.