I’d be interested to see a follow up on this. Spotify and Apple both encourage a form of mastering that doesn’t reward loudness. Apple has that soundcheck thing, Spotify as well (not sure what they call it). I’m sure this has had a not so insignificant effect on the loudness war.
I don't think Spotify has a specific word for it, just "Normalize volume", with an option to set it to quiet, normal or loud.
There's a clear difference between well-produced songs and over-compressed songs. The over-compressed ones tend to be much quieter, because the normalizer goes by average volume instead of peaks. So well-produced songs get to go "over" for some amount of the song, to give room for dynamics.
