Does the average person know that a physical book they bought can deteriorate with age, and pages can tear or fall out as well? But as long as they have that book in their possession, it belongs to them, and they can read it, lend it to someone else, to their heart’s content. How are discs any different? Surely a physical book is not “permanent” but it certainly has its own merit, as compared to a DRM ridden copy of a book from Amazon. Also, some people just enjoy collecting physical media.