I gradually got into using my phone as my primary source for my boarding pass. When the airline apps first came out, I made sure I knew how to get the boarding pass onto my phone, but always printed the boarding pass and used that. Then I got brave and started using my phone, but in the early days, sometimes the readers were balky, so I always had a printed copy for those cases.
I’m finally at the point where I expect to use my phone just about a hundred percent of the time. I remember waking up at the Fiumicino airport hotel, heading off for my morning flight with just my phone (forgot to print out a copy of the boarding pass) and breezing through all the checkpoints. That convinced me of the reliability.
And as far as printing the boarding pass when you check bags, who checks bags? I can do two weeks of international travel, mixed business and pleasure, with only carry on luggage (all of which meets the airlines requirements for carry on luggage)
The airline apps I use the most allow you to store a copy of your boarding pass on your phone, so you don’t need to worry about connectivity (but what reasonable sized airport doesn’t have wifi or cell service?). And the advantage of the in-phone boarding pass is that if you’ve requested an upgrade, it shows up on your boarding pass automatically, and if you need to make a quick flight change, you can do it while on the move, as opposed to standing in line and then sprinting to the gate because now the flight is taking off.
I know it’s “new fangled technology” with all the charging and connection and fi-wi and internodes, which our parents generation has a lot of trouble with, hence the reliance on paper. But you’re not turning into your parents, are you?
I have to confess I still print out a paper copy, if convenient (like the night before), and stuff it in my small carry-on. Mainly because a couple of times Delta has had system wide outages that not only made it impossible to read the QR codes at the gate, but disappeared the boarding pass in the app. So, with at least with Delta, its my habit now to have that backup.