Living in the mid-west, my thoughts on waterless washing fall in line with everyone else.
I'll NEVER waterless wash unless I've been through a touchless wash first. The salt and road grime is simply too much for that type of wash method. In mild weather I'll waterless wash a dusty car, but that is about it. I also like using it on door jams and other similar internal areas. In a pinch, I've used it as a drying aid as well.
One of these days, I'll try rinseless washing. As often as I wash my car, it would make things quicker and easier.