waterless wash solutions an quick detailer solutions are almost the same thing.
and i know what your talking about because i have my car parked next to the said "Garage queen" that gets wiped down after every drive without any form of quick detailer or waterless system.
but im not talking about a ton of dirt on the paint, just talking light dust that is collected after it sits for a couple days. i did a quick check of the surface with a light to check for scratches in one area, went for a drive, came back, sprayed the area to saturate the dust that had accumulated, then wiped it off gently with a microfiber towl that had a couple of sprays to prime it. and it soaked up the dust immediately and left no new scratches or light marks.
so i do believe that used properly you can remove light road dust from the vehicle without having to bust out a couple buckets and gallons of water..... but there is a big difference between dirty, and dusty.
dirty cars shouldnt be waterless washed or quick detailed with a good lubricating solution, they should be washed....dusty cars can be cleaned without, when done properly.