Redundant, superceded, obsolete. Except perhaps when you find out 10 seconds after taking a really big dump, that there’s no bog-roll left. Bit tricky trying to wipe your arse on a PDA.
paper block, you won’t have read one. LordOfTheRings was developed into a very successful series of books before the film came out. In fact they managed to get them out 60 years in advanced, isn’t that amazing!
Also Librarians like Ferret knopw all about these things, especially that impress people if you have lots on your shelves called TheCollectedWildAndInexplicableTheoryOfAntiPropulsionInjectorDynamics. But nobody is that shallow right ;P