I have always preferred the mono presentation.
Particularly more convincing compared to stereo recordings that mix vocals on one channel and instruments on other. Prevalent on older releases, which the majority of my listening comprises of.
Listening to a mono recording with just one speaker just makes me wish the speaker was in the center of the room. I tried this years ago.
Other than not hearing certain recordings with particular L/R panning effects I could live without "stereo."
One major negative- having a single speaker in the middle of the room looks odd.
All Classical, Jazz and most Rock in mono would be ideal IMO.
Hearing a mono recording from 2 speakers compared to just one in the middle of the room produces a fuller, more realistic sound to my ears. It is also the "parlor trick" of making your speakers "disappear."