I'll be shopping for a new (or new-ish) truck shortly for pulling a medium size trailer or 5th wheel. It seems like the vast majority of 3/4 and 1 ton trucks around here are 4WD, with jut a few 2WD...
I use the 4x a couple times a year, towing and just driving. If I never left pavement, I would only need the 4x when it snows. But I do camp off pavement, and having the 4x makes getting to the campsite so much easier it's a no-brainer.