I think cranky old people are cranky due to their poor health and old brains as much as their experience. The healthy ones are often quite youthful in outlook.

I think cranky old people are cranky due to their poor health and old brains as much as their experience. The healthy ones are often quite youthful in outlook. It's going to be the actual 25 year olds yelling at the apparently 25 year old octogenarians — or more probably, the middle-aged parents yelling at the kids, the octogenarian grandparents, and the supercentenarian great-grandparents.