It is an individual issue. The number of years has nothing to do with it, IMO. I am "only" 79, and I have no plans to stop driving my ATVs, truck, Jeep, or motorhome. I'm sure the day will come when "my Nurse" (wife) will tell me it is time for me to stop, but we might still have them, because my wife will do the driving. Well, OK, the truck and the ATVs might go away...
It might be time to have a discussion with those whose opinion you value: Wife, children, doctor, etc. Perhaps their guidance will be of more value than that from total strangers.
Good luck, and be safe out there.