I agree, but I think it REALLY depends on the person. My family 1000% proves that people only get worse with age. People that were assholes to begin with, only become bigger assholes as they get older, and less capable. Especially if they were "super independent" before. That also seems to hold true, in my experience, for people who were very independent and suddenly lost that, regardless of how they were before. Narcissism seems to increase exponentially too.

I also have some much older friends (like 80s and 90s older), who were always really good people, and are still just honest, down to earth, good people, just a little needier.

I guess what I'm saying is that people don't tend to change, and the person they were as an adult is only amplified as they age, from what I have seen.