[raldi]

They may not have a clue about DRM, but what they do understand is, "If I switch to <competing thing>, I won't be able to use it to listen to my existing music collection, or read any of the books I already bought, or run any of the apps I downloaded?"

And that is all caused by DRM.

[chc]

Except iPod remained just as dominant even after going DRM-free, so that doesn't appear to be the issue.

[raldi]

The iPod isn't as dominant as ever, iTunes is only partially DRM-free (many songs still aren't available for sale that way), existing songs in your collection don't get unlocked, and users have to either pay per song or subscribe to iTunes Match to unlock them.