Thank you all for your replies!
I am. We have two rigs and would most likely want to get down to just one. If we keep the FJ80, it has driveline vibration issues and it'd be nice to sort those.
Either way, it's nice to keep wear off the birfields. I've also found RWD to typically be competent enough in the snow. Nice to have the option to put it in 4WD, but AWD all the time feels a bit overkill.
Just an awful lot of miles with slightly less MPG and more wear to deal with. Ended up with a dry spindle bushing, but probably wouldn't have if I kept regreasing the knuckles (or rebuilt them) or if I had a part time kit. The steering does feel a bit heavy. I could see it being more enjoyable to drive in RWD, not even doing burnouts.