Lot of folks with FGRV are fine with a porta pottie under the couch or in a closet. Been some lively and almost heated debates on the trade off between space for a bathroom and the convenience it offers vs. having that as living space or the desirability of keeping the open feel.
Lot of the "value" of a feature depends on the individual. And their own pre-conceived viewpoint. Sister had a dry bath, wouldn't want anything else, she compared it to a wet bath in prior camper.
I had a wet bath, I compared it to wrapping a tarp around some trees and making a pot of hot water, which I dumped into a bucket of cold water, that and a plastic cup from the mess kit inside the little booth formed by the tarp was called a "shower", toilet or pit was a different tarp booth so I guess that makes this a dry bath.
Anyway you can see why I considered a shower head, water heater, real walls and a floor to be a major upgrade.
Now however I'm back to no bath in the camper. This time I'm getting me one of those pop open little booths and propane
portable showers that run out of a bucket. No more tarp and coffee pot of hot water for me, getting to old for all that fussing around