Apple Music also integrates with your own music library, which is the killer feature for me.
Some items now stay greyed out because they don’t have a license. And some versions got replaced (eg, to the remastered ones).
Perhaps things have changed, but 10 or so years ago I "uploaded" my music to Spotify and it didn't actually upload anything, nor did it play my local music.
Rather, spotify used whatever it had in its database with the same name/artist, which wasn't always the same recording or even the same song.
And then there were the ads. No thanks.
I have my own library of more than 22,000 tracks and use Winamp, Jellyfin and VLC to play them wherever I happen to be. No muss, no fuss, and most importantly, no ads.