What you might not realise is that with proper diet, all the illnesses that old people normally suffer simply don't happen. And apart from that, http://www.healthyat100.org/
"The loneliness of elders in the modern world today is sometimes so profound that they literally die of broken hearts. In the world’s most long-lived and healthy societies, on the other hand, elders are never shut away from the unfolding of life. Instead, they are part of extended families and continually have opportunities for mutually nourishing contact with younger generations. In Okinawa, sibling rivalries can become most heated over who will get to take care of their ageing parents."
So if you do come around, the one who is healthiest can climb up the trees in the nut orchard to pick them.