Detroit is a crime ridden and cold place in comparison to San Francisco. I moved to a similar city (Cleveland, OH) and I see why people may want to live in SF instead of this place. The neighborhoods look very depressing, it's overcast most of the time and despite cold weather adequate house construction quality is just not there, so maybe I'm paying less for the rent, but living in these old houses with leaking foundations and walls full of holes is just not comfortable.