I don't think that is true, and I almost universally reject what
@Yora is saying.
It's not that old gamers refuse to share campaign stories; rather, that for most of us, old campaigns are like dreams. It might mean a lot, but telling the story of it almost never means a lot to the person to whom you're telling it.
Seriously- go up to someone and watch their expression when you say, "Hey, let me tell you about this dream I had ..." Most people don't want to hear about your past dreams, how your fantasy football team "pulled one out" over the weekend, or this really cool campaign you were part of in the '70s.