I'm not posting about efficiency, I'm posting about what people would, actually, on average, do, and how good that would be for them. You know, random people in the park, not utilitarians.

I remember seeing one of Aubrey the Grey presentations, and he said something like:

It is very simple, look.

Shows a picture similar of young women playing volleyball.

• Fun

Shows another picture of old women sitting on a bench next to them

• Not Fun, see, it is simple.

I'm really glad your grandpa has all that energy. My grandma used to walk 10 kilometers a day when she was 80, I couldn't catch up. But let's face it the way Aubrey faces it. It is not that 95% of elders are boring and don't want to go do what our ancestors did. It is just that they can't. They are not able to. It is painful, or impossible, or really hard, or socially frowned upon. I don't think older people spend more on food and wine because with experience people realize that the best things in life are food and drinks. I think they do it because there is nothing left for them to use their money on. It is a cruel world, and Woody Allen makes a good case for it: My next Life