The article you linked to appears to describe something totally different. It says that if you delete your music from your computer, then re-downloading the music through Apple Music will give you DRMed files. But it also says:
> If you haven’t deleted your own copies of your music, then there’s nothing to worry about. If you download onto other devices from Apple Music, those devices will get the DRM versions, but you’ll still have your DRM-free originals.
Re:Apple Stole My Music
by mistermann on Thursday May 05, 2016 @09:46AM
(#11635992)
When he says copies, I think he was referring to his backup?
The preceding sentence is:
> Either way, if you’ve used iTunes Match as a convenient way to free up space on your Mac by deleting your own copy of any of your music, don’t cancel your subscription in favor of Apple Music if you want to keep that music DRM free.
Given the reference to freeing up space, it seems like he is talking about the original music files within iTunes and not a backup.
http://9to5mac.com/2015/07/02/apple-music-vs-itunes-match-dr...