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No, it doesn't delete your original copy.
And also never did I lose a song when they lost the rights to a song.
They will simply stop selling it, but if you bought or matched it, you can still download it.
Incorrect. I had several songs that Apple had lost their license to that refused to download, even blocking the downloading process completely until I went in and searched for them one by one on my iPhone and removed them as that wasn't even an option in Music.
 
> iTunes Match is officially part of an Apple Music subscription

This is not correct. The matching that you get with Apple Music is different, it applies DRM to the unmatched files when it uploads them. iTunes Match will just upload your original files.

I know this because I was relying on Apple Music to sync my tracks that it couldn't match. It worked fine for a while then suddenly stopped working for all my uploaded music. After talking to various folks at Apple it was decided that the DRM must have gone wrong somehow and the only resolution was to delete and re-match all my music again.

I haven't got around to that yet and have been considering moving to iTunes Match to avoid the application of the DRM to my uploaded music.

Update: The DRM thing is no longer true! Thanks to some replies for correcting me. I just uploaded some music and it downloaded as a mp3 rather than a DRM m4a. That's great news!
Hi I am a iTunes match user for years too. I just join the apple music too. Now I have both service. Is my own matched song from apple music with DRM? When i got the iTunes match only, my matched song have no DRM and I can edit it in GarageBand. Can I do the same in Apple Music only? I cannot tell as I have both services right now
 
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