When can we get to the point where printing is not needed anymore. They said back when PCs etc kicked off that we would safe so much paper and therefore the forests of the world!
Your industry may vary, but I think we have in fact achieved much of that, cancelled out by a general increase in what paperwork remains as computers enable more people do ever more (arguably pointless) clerical work.
I can't remember the last time I wrote someone a letter on paper, or wrote something down in order to store information. I will occasionally resort to paper for sketching diagrams or equations as I work on something.
Paper is of course alive and well for labelling things, making information portable or disposable
[1], and communicating with large bureaucratic organisations that don't believe in email. Our printer mostly gets used for leaflets, posters and address labels.
Fax has almost died out completely (except in Japan and the NHS, it seems). Filing cabinets aren't quite on the endangered species list, but are much less prolific than they once were.
Original (paper) documents are often required for legal purposes, even if they just get scanned into a document management system.
Forms seem to be a sticking point in a lot of places. Too many people are creating paper-only forms for things because they don't know how to do it electroncially, even if they're distributing the blanks as PDF.
Have anyone ever tried to feed a printer successfully with paper that have gone through it once before, I think not!
Assuming the paper isn't bent or creased, I've found it works okayish on inkjets with an uncomplicated paper path, and I never met an impact dot-matrix (that didn't rely on tractor feed) that cared. Lasers not so much, as the fuser tends to give the paper a curl, and they tend to have paper paths that will jam if you so much as look at them wrongly. Even the venerable Laserjet 4000 series is a bit dodgy at duplexing.
[1] For fairly obvious reasons, while I'm happy to refer to PDFs of datasheets on a tablet or computer while doing electronics, I'll print out the instructions for servicing a suspension fork...