Basically, that's it. Looking hard for a minitruck to take over winter plowing and stuff around the property. My driveway is no joke, 1000 ft long and steep, with a hairpin. How steep? When I use my GMC Sierra, I run chains, all the time. We haven't owned 2wd since building here. In winter, my driveway is a right of passage for any new UPS guy's. It's skiable. In looking for a mini truck, just how much better is having a diff lock than without? Worst case I'll chain it up and not worry about it?