I live in the Philly area. I have a Fuji touring that gets ridden until first snow, and then an old hard tail mountain bike with 26" that comes out until Spring. There's enough frost and bizarre frozen patches around that even after the snow is "gone" I like riding on the wider studded tires.
Of course, I pay a speed penalty for it. I go from really slow on the touring bike to really, really slow when I switch to the mountain bike.
This is my first year with the electric pedal assist bike. I'm not sure what I'll do with that during the winter. It has 27.5 wheels, and there aren't a lot of choices in studded tires for that size.