My Dad was on the golf course the day he passed on at 89, and my Mom lived into her 80’s as well. If they weren’t traveling, they were out dancing, socializing, championing new causes, etc., etc. right up to the end.
My wife and I love living life to the max as well, and have taken on new projects to keep it fresh and exciting, along with all of the family stuff, and everything else we do.
In our society, it’s easy to feel irrelevant as you get older, but definitely not necessary. Getting older will happen to everyone who is lucky enough to live that long.
IMHO, what matters is making the most of the time we have here–whatever that means to each person–and even at best, none of us really knows how long or short that may be.