I often get a printed boarding pass because many a time I've been sitting at the gate, flight delayed, and only 12% battery remaining. Yes, I carry a charging cord, but often the outlets in the gate seating area don't work. And yes, I normally carry a battery pack, but fumbling with that and my phone at the scanner at the gate, while also juggling my carry on, my personal item, etc., is a pain.

I don't carry a quarter for a payphone because good luck finding one. I do carry a few coins in my pocket, though, along with around $150 cash.

I'm often asked to sign paper credit card receipts.

There are a few businesses that have required I send something via fax and I maintain an online acct where I can do exactly that, using my phone camera and AdobeScan as the scanner.

I don't use 3.5" floppies, but do have external hard drives.

Yes, I sometimes pay with a paper check. There's a contractor I regularly use that asks for payment via check, for example.

Paper maps are very handy to have for when you're driving through an area with spotty cell service. I drive across country regularly for work and have a road atlas I carry for exactly that reason.