I think a lot of that has to do with the user upload error. Apple does do a lot of housing for music already but a lot of the newer albums and artists who are “revamping” their catalog are pushing out updates that I’d think Apple prioritizes by relevance.
Oh no, I'm talking specifically about stuff on Apple Music. It's got the upcoming remaster of ...And Justice For All back in 1988, instead of 2018, for example.