Noobie, Stu, here.
Recently bought a 'new' demonstrator car* (2,014 miles on the clock and about the same number of swirls on the bodywork 🙄) - some 12 years after my last new car. Apart from trying to work out how all the new gadgets worked in the modern age (I felt like Austin Powers after he'd just been defrosted), I fell headlong down the 'detailing rabbit hole' on YouTube. Man, how things have changed in 12 years.
After spending a truly ridiculous amount of time and money researching and buying various wash media and products - some that smell beautiful (ONR) and some that smell like a corpse ripening in a heatwave (Korrosol), I think I've finally reached my own conclusions about what works best for me. One thing that struck me is just how misunderstood ONR is by online detailers and their fans. It would appear that a great deal are creatures of habit and really struggle with change, even if it costs them time, money and water.
Foamy suds and surfactants that you have to waste time washing off seem to make people happy, it seems - even if they don't do the best job available. I liken it to when you were a kid, and you demanded sudsy foam in the bath, not because it did the best job at cleaning you but... well, you wanted to play with foam because it made you feel better about having to be in the bath!
Anyway, I'm a big fan of ONR because it works and it saves time, water and effort. It stops my paint getting more swirls than it's already got, and I know that this isn't true of soap, no matter how much it reminds you of playing in childhood baths or snow when you were a kid.
* Ford, not Ferrari.