I've had my '93 Suburban in 4wd almost all day today. Most of the side roads are snow covered and dangerous. I take it out of 4wd when I can see the actual asphalt, so as not to cause wear on the drive train.
I don't understand your comments about a rear wheel drive trailbazer being in 2wd???
If your front wheels on your lifted truck keep locking up when braking on snow, you probably have something wrong with your back brakes. I have had that happen in several Chevy 4x4's when in 2wd. What was happening is that the rear wheels were still pushing the truck when the front tires lost traction while braking. If I'd toss it in neutral while braking, the problem would cease. It also ceased when in 4wd. So I had the brakes checked and the rears were always the culprit.
It was a RWD 4x4 trailblazer in 2wd if that makes more sense, it was the shorter wheelbase version also, and that was on pretty much ice with a light in the ***, short wheel base SUV.
As for the 85 F150 I had (was just a mud toy) and my current 2wd 81 f150 has done but not as bad, the rears don't work too well. I put a whole new break system (rotors, pads, shoes, cylinders for the drums, new steel and rubber lines front to back) in the 85 and still had a issue of locking the front up first in wet or snowing conditions if the breaks were hit hard, the current 81 did it to me once.
I don't drive my 81 in the snow/salt anyway, it stays in the barn all winter where it's not rusting away lol.
As far as 4x4 on the road, I agree about disengaging it once you hit asphalt but I like to "feel" the road in 2wd I guess, I can better judge my "safe" speed that way, now granted on snow covered hills 4x4 would be a must.
It's just personal preference, also in snow I'm like a kid controlled drifting turns when I can safely get away with it.
I will say one thing, I had a 07 Z81 Sierra and that thing did not like to drift, the traction kicked in even on ice and was like "**** no you don't" and would straiten out lol, a 01 325ci I had would half *** straiten up, mainly it just cut the power to the wheels, the truck locked one side up and really took over, did a good job.
I have had a lot of cars and trucks lol