Intelligence declines with age. Personality changes with age, like hair color. People become cranky as they age. Older people tend to have little interest in sex. Older people have great difficulty learning new skills.
Older people tend to be inflexible.
Most older people lack creativity and are unproductive 10. Most older people are lonely and isolated. Senility is a disease and is not natural. Even among those 80 or older, only 20-25 percent develop dementia. Senility is a meaningless term that should be discarded.