I know it got old for me because I was always breaking various plastic parts - A-arms, steering knuckles, rims, and even bulk heads. Of course, it helps to not hit things, but I know the plastics are far more brittle when it's cold out...
It gets old, because for all the screwing around, a 10lb car does not go for crap in a foot of wet snow. Go a few feet, get stuck, spin. Give it a little foot nudge... go a few feet, get stuck, spin.
Light powder snow is a little better, but I'd rather take my trucks down to where I work or at the local school and run them in the gym in the winter.