I'd like offer the example of a crew with a combined age of 54 the Pinnacle FL410 debacle. Captain age 31 and F/O age 23.
Personally, I'd rather be in the back with a couple of 65 year olds up front. Even a couple of 70 year olds.
I'd like to call everyone's attention to the on-going study on aging pilots are Stanford. It would seem that the top pilots keep on trucking, while the bottom pilots really lose their ability.
However, when I turned 70, I decided I would no longer carry anyone in the airplane unless the right seater could land.
The goldfish