I'm 75, I got my first FAA license in 1966 (1720853, I can still remember the number without peeking), I've owned and driven racecars and as an automotive journalist tested every Ferrari, Lamborghini, Porsche, Maserati, AMG Mercedes and you-name-it that's out there. I go to the gym five days a week and plan to live to 100, strongly based on my mother's longevity genes.
But when it's time to drive somewhere in our Porsche, I let my wife do it. She's 15 years younger. Oh, and I don't fly any more either. Quit doing that about 10 years ago, when I sold the Falco I'd built.
Anybody who won't admit they're losing a step, and then another step, as they age is fooling themselves.