"MOST of the Apple library" ?
Erm, no, only about half the Apple iTunes Store library at best.
Just so many artists have their best products missing from the service, trying to obviously make you buy the item(s) instead.
It really is quite annoying too... you search for a track you know must be available from Apple iTunes inside the Apple Music app, yet nothing comes up (after first slowly having to check through the massive results page!). Only to then open the separate iTunes app, and low-and-behold there the track is, often on multiple releases.
Although I've always found iTunes (and now Apple Music) still has vast holes in label back catalogues it's unreal – it's like half of electronic/jazz/funk/soul music history never happened, with other genres/styles barely existing at all.
And as for compilations, who thought just showing the track name was helpful?! Obviously I need to see the ARTIST name don't I, short-sighted UI design people! Or the fact that remix compilations, often don't have the name of the remix on them, so you have no idea you're listening to a remix at all, or sometimes they simply have "Remix" on the end, when there are many remixes for said track. All really annoying UI/UX issues. Some of these are caused by the original uploaders, but Apple UI is to fault for most issues.
BTW, watch your metadata too, lots of scrambling a percentage of users have had massive problems with lost data. And also, when you add a track to your My Music or playlist: go and check it's been added, as some ways of doing it are faulty, so you often have to find another way to do it to get the track where you want it.
Apple Music could be really good if only they just fixed the SMALL things for once, but they are just so annoying that makes me want to scream.
