> If I were using iTunes, perhaps that would someday be untrue.

That's simply not true. The iTunes store sells DRM-free AAC, a documented format. You can transcode it into literally any other format, if you don't like AAC. Ripped CDs are ripped to the format of your choice.

Only the Apple Music streaming service uses DRM - and buying a DRM-free version of any track is literally one click away.

I can think of many things to criticise Apple for, but lock-in of your music is not one of them.