I think one of the biggest issues is for people who have Google Family Link. If their parents set their rating limit to E 10+ (or the similar rating in your region), then they can't get YouTube Music. I'm one of these people. I have a Samsung phone, though, so I could get like, Samsung Music through the Galaxy Store, but I don't want to have to download another app, so I’m just going to use My Files as my "default music player". I'm just sick and tired of downloading apps that I don't want on my phone, like Microsoft Teams, which I pretty much had to download for school. Granted, I kind of hate Play Music anyway, but it still functioned moderately okay on my phone for what it was!