If powerful old people go to sleep when they are bored then they run the risk of being overtaken by younger, faster, and less risk-averse people. Maybe a good model is corporations: Corporations are also immortal and can learn more and more but they also have more to lose and they seem to acquire knowledge that also seems to slow them down. If there are changes in the environment or innovations they often cannot adapt fast enough and are quickly overtaken by younger players.
If powerful old people go to sleep when they are bored then they run the risk of being overtaken by younger, faster, and less risk-averse people. Maybe a good model is corporations: Corporations are also immortal and can learn more and more but they also have more to lose and they seem to acquire knowledge that also seems to slow them down. If there are changes in the environment or innovations they often cannot adapt fast enough and are quickly overtaken by younger players.