The drone obscures any music listening, and if you use the car as a primary driver, it is not a particularly good idea. Unless, like some of us, you would rather listen to the exhaust than to music.
The upside advantages outweigh the negatives. The side sills are now without heat. The cabin temperature has dropped.
Small animals are terrified when you hit the start button.
I have the stock exhaust and stock ring/pinion (100 miles on all) in boxes. JonB indicates that there is not an e-bay market for them.
Alice