[trilbyglens]

The difference is that the books we still read are the ones that have proven to be more universally true than the rest. We only know about old books that have remained relevant in one way or another. We've long forgotten the tripe.

With modern things, we don't yet know what will remain relevant and what will fade into obscurity or lose its relevance.

[paulryanrogers]

Plenty of still-popular ancient books are full of fiction, myth, and superstition. Perhaps one could say some have remained more useful.