Here's my take, which is worth not much. I have never owned a 4 wheel drive anything until this one, which I got a year ago last May. I ordered it with the 4wd drive because the dealer really dinged my on my 2012 3500 srw 2wd trade, which I also ordered. Around here if it is a 3/4 or 1 ton and not a 4wd nobody wants it. No good reason for it in our area but that is the way it is. I did get lucky and sold the 2012 myself to a very rare person who did not care if it was 4wd or 2wd.
Last fall on a trip to the New England area I had the need for 4wd for the very first time in all our years of traveling. At a park near Boston I was trying to park the fiver and got bogged down in some sand. I put in 4wd low and got right out of it.