We have a 4X4 3/4-ton (third seat)'79 Suburban. It has ~80,000 miles on it. Within the first 70,000 miles we replaced the front drive shaft (transfer case to front diffy) twice, the engine once and the transmission once. That's the basic driveline.
In the first seven or eight years of use we replaced both front fenders, the skins on two doors, an entire third door and the skin on the tailgate, along with rear quarterpanels. Currently, it looks like a rustbucket, you can see outside from inside through the rear wheelwells and all the brake lines are developing pinhole leaks.
My wife was the sole driver until the last five or so years, since I gave up my dumptrucks, etc., and now use the Sub to pull a small trailer occasionally. It's never been off an established road.
The 4-wheel-drive feature gives it lots of grunt in low range and is OK for getting through heavy snow carefully, but really is hazardous at highway speeds on slippery roads. It lacks the stability of, for example, our Audi AWD sedans, for slippery circumstances. And it get 10 miles to the gallon.
If you want a truck to muck around the farmyard with and put full sheets of plywood or 20 pairs of skis INSIDE, that sort of vehicle makes sense. If you want to drive distances on winter highways, get something else.