Verify, but “most” newer actual 4wd (not AWD but those with a T case neutral position) are flat towable.
If going for one all around truck/vehicle that can do everything, then I think you’re on the right track.
That said idk how or why your 15y/o truck is “falling apart”, but financially, I’d still hold off on buying anything newer, especially pickups, if you can. For a while. Prices will come down more. Just finally leveled out 6-8months ago and have started dropping.
But generally the better the fuel economy or the more loaded features haven’t dropped as much. (Gas prices are supporting the better mpg truck prices a bit imo)
I’d be more inclined to have a primary vehicle and have the capability and comfort of a full size (and I need a full size truck). And then have a secondary vehicle to use as a 2nd vehicle/toad.
Jeep YJ/TJ/XJ are great toads. Slap some mounts or a bumper that will accept a tow bar on it and some may mount tail lights and let ‘er rip. Provided the moho isn’t on the edge braking wise. I’d not prefer to integrate braking into any newer vehicles.