I can think of a number of reasons to move to a new apartment. One of them may be too many ex-girlfriends with shotguns infiltrating your neighborhood. Another, finding out how the street you live in would be compromised by the thermal damage caused by a nuclear explosion in the center of your city (just fill in town and weapon, and conveniently check your own place here; via Goeff Manaugh’s article on “Nuclear Urbanism,” here, which includes a map of Manhattan hit by the equivalent of a Nagasaki grade device).
For what it is worth, I’ll stay on the West Side (less smog, amongst other things), but move some 30 streets to the North.