I think the vast majority of people don’t even realize or understand DRM in general or if they do they don’t fully grasp the fact that at any point in the future they could lose access to the rights protected things that they have purchased with real money if the company shuts down their servers, they lose access to the account, or any number of other things that would cause the files to be encrypted virtual paper weights.
That being said, I use Audible a few months out of the year to get a few credits for the Audible exclusive content, but I don’t view those purchases as content I now own, I view that stuff as “rented”. Though I’ve been looking into some open source projects that can decrypt my Audible stuff, just haven’t had time to do it yet.