There are very few customs or courtesies that have survived these last 30 or so years. Men no longer take off their hats in a restaurant, folks don't stop talking on their cell phones in the grocery store even though they are checking out and the cashier is asking them a question and men don't let women get off the elevator first.
The last remaining custom is getting off a plane. Everyone waits their turn and lets every single person in the rows ahead of them get off the plane first rather than rushing for the front exit door. And other passengers will actually help you place your luggage in the overhead compartment or help you get it down at the end of the flight.
I am encouraged to see that some of the old courtesies remain to this day. Heck my 20something year old next door neighbor passes me in the hall and won't say 'good morning.'
What does this say about us as a people and a culture?...Think about it.