Yes. And this is the reason why they'll be back in the caves and use stone tablets...

Seriously: The digital stuff is nice, but it requires such a huge technological pyramid for it's upkeep.

And i wouldn't be sure that we can sustain this pyramid for all of the future.

On the other side, paper, books and ink are such ingenious _technology_ that exactly fits the problem (only think about the hierarchical random access feature on top of linear information ordering provided by books ...). If we forget about this genius idea (and how to work with it), we have earned going back to the caves.

Meanwhile, the printing machines publishers use for book manufacturing these days take PDF files as input, along with paper and drums of ink. Publishing doesn't work without the tech pyramid backing them up, all the way from writers like me (text editor dependant!) through the production department to the shipping department and royalty accounting system ...