Paper Books Can’t Be Shut Off from Afar
popula.com
popula.com
If we eliminate the Banksy absurdity, I believe that there is some value to the argument: it's simply physically impossible to shut down a paper book because it's a piece of "technology" that's easy to understand and inspect. In contrast, an e-book is always just thousands or millions of bits that you usually don't physically inspect. HN readers may generally be tech-savvy enough to confidently tell which books or platforms are immune to remote-shutdown, but you may be giving too much credit to the proverbial grandma (or even mother, as my own mom definitely wouldn't have any idea).
FWIW, I much prefer paper books for many reasons (aesthetics, tactility, lack of temptations towards distraction, etc). But longevity isn't amongst those reasons - with backups etc I'm much more confident of hanging on to my epubs than I am my physical books.
There are endless legal sources of non-DRMed ebooks online. They aren't hard to find. I don't recommend anything else.
If the idea of losing access to some data is the "most grotesque and awful thing" the author can imagine, I suggest the author read some more imaginative books.