I wouldn't be so sure about that. My own physical book collection is a shadow of its former self, as I've scanned and tossed the rest.

I can't ask my dad anything anymore as he has Alzheimer's, but he had given me his book collection and I've been scanning them, too. (Of course I don't cut up the sentimental treasures, but there are only a handful of those.)

Also, years ago, he got low vision and couldn't read comfortably anymore. If it was today, I would set up a projector to throw the pdf pages on the wall so he could keep reading.