>Times have changed too much for their experiences to be all that relevant to your life as it is now, and there also is no reason to do things just because that's what has always been done.
>No, because I know way too many old people that thing "I KNOW BETTER THAN YOU DO BECAUSE I'M OLD!" Being old doesn't make you smarter, or wiser, or more experienced than anybody else.
Speaking as someone who is 40 but remembers being 25: I agree with this somewhat, but I think I agreed more when I was 25. It's true that shit changes too fast to keep up with. There are some things that are still the same though. People are still people. Most people (not all) gain common sense as they get older. Most people also gain a broader perspective, which is something that really only comes with time. So you're gaining knowledge, but some of it loses relevance over time while some of it stays relevant. I guess on the whole they're not a bunch more knowledgeable than a young adult, but young adults have knowledge older adults don't, and vice versa.
So I'd take someone's age as a factor, but I wouldn't discount them completely just for being old. I'd consider their willingness to keep up with the times, as well as the topic. I'd trust an older person's views on human nature. Not sure I'd trust their views on, say, investing.
I think older people look back and wish they'd spent some of their money on different things, and that's why they can sometimes be such pills about spending. Different perspective.