I wasn't much different at 60 than I was at 40. 60-65 was difficult, mostly because of the loss of parents but I could feel age creeping up. I think that had a lot to do with it, loosing both parents and becoming the oldest in the family. 65-70 was the pits. It's as if I could feel the change daily.
Good luck if you plan on sailing the canals at 80-85.
Am I pissed sailings over? You bet!
Of course as always, 'your milage may vary'.