If someone is using an air compressor all the time (nail gun, paint gun, etc) and spends the $$$ there are some really quiet ones on the market now.
... I'd guess though that anyone looking at the price of the RideAir compared to an air compressor probably isn't considering one of those...
Personally, I ditched my obnoxiously loud air compressor years ago and switched to using a high volume floor pump with the tire valve cores removed. Which usually works though sometimes with way too much faffing about.
The RideAir is like that system on steroids. With a fresh tire it's still most efficient to remove the valve core but the function is excellent - definitely better than the POS air compressor I had.