This thread was a head-scratcher for me and that was before I read the OP’s sig detailing what’s been invested in a late-model V8 4WD. Don’t know how much of that is on your dime but people seldom get any significant (or any period) ROI on their mods when selling or in an insurance settlement.
I had a RWD Xterra for 11 years. It was a 5-speed stick and fun to drive, and held its own off the pavement as well as a RWD can, yet I knew early on that I would never go w/o 4WD again when it was time for a new truck. I can’t begin to imagine making the move you’re supposedly considering, but to each his own, and one thing is for sure: there are probably a considerable number of people who would be glad to take your current rig off your hands.
Let us know what you decide. I’m curious to know the outcome.