When we were shopping for ours I asked the salesman: Does that one have AWD? to which he replied "We don't sell them without AWD". FWIW, and yes we live in a snow climate. Also FWIW we used to live ini Texas and my wife still had a fixation that AWD was needed. Me notsomuch, but there you have it.
Oh, she did compromise and get a FWD crossover when we lived down there, and when the tires wore in the front more than the back, we replaced all four anyway.
I don't think honestly that this decision should be made on the basis of tire wear or life.