I've never tried a dry master but would like to. I can't possibly comment on what I don't have a clue about, but I have managed without one for a good few years. I'm kind of looking forward seeing the difference and I'd consider one of these a luxury too, if I'm being honest...
Zeta, luxury? Perhaps that's a fair comment... If it's heat you want at a cheaper price, an in-line heater does the trick, but there is a knack to using one effectively.
The only time I don't use my CRB is on loop pile carpet....