Family
I can sympathize with Tommy's sentiments, though I work for a competitor. They're more especially pertinent since we were absorbed by an RBOC. I'll add an additional reason to his fear: short commute. Jobs in the New York metropolitan area are concentrated in NYC. You can see this just by looking at a map of the transportation infrastructure.
I don't quite understand why this is so. Last I heard, ~8 million people trek in and around the City. That's a lot of talent wasting time on the World's Longest Parking Lot.
After reducing my commute by an hour, I do not want to return. My daughter is in bed by 19:30. If I worked in the City again, I would not see her, and our family would not dine together. These things are precious to me.