Software, especially on mobile platforms, feels a little more ephemeral anyway. An app left unmaintained won't support high DPI, won't support new screen sizes,

Software, especially on mobile platforms, feels a little more ephemeral anyway. An app left unmaintained won't support high DPI, won't support new screen sizes, won't have dark mode, doesn't support 64-bit CPUs, or even just gets deliberately turned shitty via updates because there was money to be squeezed. So if I buy an app and come back in 10 years I'm pleasantly surprised to ever find that it still exists and works. That's very different from buying digital music (which I buy from Apple DRM free) and digital books, which should not change after I buy them, don't need compatibility updates, and really ought to work as long as I have the files, even if someone goes out of business and I can't redownload them. Books really have much more in common with music than they do with software, and it's unfortunate that digital books and ebook readers escaped the "I bought hundreds of dollars of music and I should be able to play it on whatever MP3 player I want" arguments that freed us from music DRM lock-in.