I don't think I've seen a single 2wd pickup as a plow truck up here. The big city dump trucks I'm sure don't have 4x4 (or 6x6, be it the case) but other than that, all the pickups that plow around here are 4x4. We also probably get more up here than you do. The real big parking lots... malls and such, hire out full size construction front end loaders to plow their lots. Snow piles are probably around 15-20ft high where they push all the snow in the corners. The amount theyre pushing around up here, along with the fact that for weeks on end you get a layer of ice under it, I don't believe you could plow with a 2wd that weighed any less than 20,000lbs empty.