> The main thing is that information which is important to people will get converted to newer formats over time, just as old print books get reprinted if they're popular.

Vs. decent-quality old "dead tree" books, properly stored, can be ignored for centuries and still be perfectly fine.

You might want to ask a good historian or librarian about all the incredibly important (historically, to us, now) documents which we know existed, but we do not have, because there was no continuously-operated, high-budget "Holy Brothers of Document Preservation" monastery doing all the re-copy work needed to preserve them. (And maintain off-site backups in case of fire at the Monastery, and ...)

(If you aren't familiar - most of the materials used for documents in ancient times degrade fairly quickly. Unless (say) carefully stashed in a nice, dry cave in an arid climate. And even that stuff tends to be "crumble if you touch it" fragile.)