For me personally paper is indispensable as a design tool for sketching out complex systems. I "think" more clearly on paper than I do with any digital tool I've used. In an aviation context I mostly use an iPad these days (learned to fly long before iPads were a thing) but I carry some backup paper charts. I've had chargers fail mid-trip and the electronic flight bag apps are real power hogs. And that's not to menti…
Re: GPS failure, that's orthogonal to the paper argument, since paper doesn't provide GPS either..
I personally am looking forward to the day when paper charts stop being printed! Huge waste of resources that could be better allocated..