This past weekend I was flying on Delta and my first flight was delayed such that I was going to miss my connecting flight, so I rebooked onto a later one. During my layover I visited the gate agent to get a boarding pass with a seat assignment.

"Do you have the Delta app?"

"Nope."

Then he pressed a few keys on his keyboard and printed out a new boarding pass for me within five seconds. I couldn't believe he was trying to kick me over to the app if it was that easy.