JayS is spot on.
However, having had a AWD GrCher, an AutoAWD / 4wd TrBlzr, and two simple 4wds in the past… binding is slightly overhyped. Its only a drivability problem when the front wheels are driven into tight angle turns (> ~30* from center depening on vehicle, IMExperience).
It is a very real problem from any standpoint. However, even in the worst Buffalo winters you won’t be driving around in 4wd all the time anyways.
4WD (on road) is for clearing large snow berms (a driveway apron buried by the muni. plow), getting out of a snow berm (1’ fell where you are parked), and dicey grades with old / slushed snow. Otherwise you should simply be in 2hi in most situations.
Of course, you should teach Her this.
For overall comfort & ease of use, any AutoAWD or true AWD is easier and far more reliable based on minimum effort.
Sorry, woulda counseled all of this prior to purchase, but I dont think that anyone realized you were considering the option.