That's what got me to finally set up a little script to tag, convert, and store music files in apple music. I was getting annoyed not only at entire albums or artists being unavailable on apple music, but also sometimes individual songs, which just seems insane to me.
Now I drag some flac files into a folder, the script converts them to ALAC, tags them from discogs, and adds them to my apple music library, which auto syncs to icloud so I can listen to them on my phone whenever I want. No more "unavailable". I also back the files up to a second location because one time like 10 years ago I think I heard a rumor of itunes randomly deleting files that were added manually without being purchased through the store. Don't know if that's a real thing or not but storage is so cheap it doesn't really matter.
Now I drag some flac files into a folder, the script converts them to ALAC, tags them from discogs, and adds them to my apple music library, which auto syncs to icloud so I can listen to them on my phone whenever I want. No more "unavailable". I also back the files up to a second location because one time like 10 years ago I think I heard a rumor of itunes randomly deleting files that were added manually without being purchased through the store. Don't know if that's a real thing or not but storage is so cheap it doesn't really matter.