Makes you more aware of discrimination
What is interesting about this whole debate is that you only realize how deeply age discrimination pervades your own culture when you go somewhere else and you are surprised to see older people working.
If you think about it there is no reason why a flight attendant should not carry on working as long as he/she wants provided they pass the medical (or whatever). They are not there for decoration or for marrying the passengers.
I am sure that if the airline lets someone carry on flying they are confident that they can carry out all the duties safely, whether that is remembering to close the door before takeoff, flinging a 100lb emergency door over the wing or hogtieing a drunk passenger.
But what beats me is how some of these people can get into their eighties on a diet of airplane food. I suppose they bring sandwiches.