Two of my four children live close by and help me. My husband had friends in our wine making group right until the end. He had a beautiful view of our mountains and meadows on our 25 acres . He didn't lack for friends, family or stimulation, He just wore out and wasn't interested anymore. My husband started going "off " around 70. He died suddenly at 80.
Having Parkinson's and all the worry that goes with it is very hard on the victim and the caregiver.