It is one anti-ageing strategy. Hungry rats lived four years instead of the normal two years. It is hard to predict. The tissue s proliferative capacity may not be the limiting factor. Immunity may be more important.
Social contact appears to improve old people s lives.
The survey did not show the age of contact. In bees, the workers die young and the queens live a long time. We could try transplants on them. For women, quality of life decreases with widowhood but recovers after a couple of years. They manage to reinvent their lives.