I'm in my 30s and I still print out tickets beforehand when possible, lol. Depending on my phone just causes me too much anxiety. 1.) I don't want to have to worry if I grab an Uber, meet up with friends somewhere for awhile beforehand, am texting/checking my fantasy lineup, etc. in the meantime, that my battery's going to drain and die before I get to the stadium. 2.) Once I get to the gate, if I don't have my phone ready to go and keep clicking buttons on it to keep it awake, I have to turn it on, enter my password, wait for the app to load, hope I have a good enough internet connection for it to load, find the place where the barcode is, etc., and that causes anxiety holding up the line compared to just pulling a piece of paper out of my pocket. So I totally understand the preference to at least have the option to print your ticket beforehand as well. It does seem like that solves a lot of the worry and concern for those that don't have a smartphone, don't want to depend on it, and/or don't want to slow down the lines more than you have to.