Also not smelling is neutral while the other two aren't. Nobody said "there is an appropriate amount of light in here" or "there's an expected amount of background noise".

Dark and quiet are the extreme ends of the spectrum. I think smelling bad and good are the ends of the spectrum for smells, although smell is much more multi dimensional, but no smell is neutral.

[–] fushuan@lemm.ee 3 points 1 year ago

In the quiet sentence it is implied that it was loud enough before for the commenter to appreciate the quiet.

The smell equivalent would be "it finally doesn't stink anymore" or something like that, and it doesn't sound weird at all.