I had to retire at 60, then they changed it to 65. I saw a lot of really competent pilots have to retire before me at age 60. It didn't seem right. The younger pilots want to upgrade, that is understandable, but it had nothing to do with safety. I flew with some pilots that were losing it at 55.
I am long gone now but when a pilot is no longer competent to fly an airliner it is only partly do to age. I know the physical is a joke but people are aging better than in the past.