Most old people are set in their ways and cannot change. It's not true. Recall from statements 2. and 5. Most people over the age of 60 have no interest in or capacity for sexual activity. This is a myth, not a fact.
Personality changes with age, just like hair gets gray and skin wrinkles.
Sometimes changes occur in the case of an overwhelming crisis. Old people can't learn new things as well as young people. Elders tend to require longer time in learning new information, and just like young persons, elders pick and choose things they would like to learn. Chuck Yeager, the first pilot to break the speed of sound, continued such experiences in his 70s.