I love cities, think they are great, and live in the Bay Area myself. I don't know how old you are, but much of the flight to suburbs was due to the building of freeways and the fear of nuclear attack on cities. Younger people did not grow up with bomb shelters and duck and cover drills at schools, so living in a big city is not something they fear. If we have a nuke or two blow up a few cities today, there might be flight out of the cities once again. I sure hope that doesn't happen.