Its okay to use a waterless wash but keep in mind it's not waterless.. theres water in the solution, you use tons of water to wash your mf towels. You go through alot of mf towels and it takes a ton of time and yet there is a chance of marring your paint .
Rinseless washes ftw man. I need around 35 minutes to wash the entire exterior and dry it without worrying about water spots and im leaving a small layer of protection as i wash. In the same time i can also clean the tires and wheels.
This is just my preference and others can disagree but keep in mind if you rub a dirty surface with little to no lubrication, youre scratching your paint.