>>68481
Both things. Like, seeking meaningful experiences after you wake up to the limits of the world are either journeys of self-knowledge (testing your own limits, exploring your mind's capacity, etc..) or journeys to know what else there is (knowing radically different cultures and people, etc...)
Those experiences do lead to new understandings of past experiences, making them enjoyable anew but not in the same way you enjoyed them as a child.

>>68482
It may be the case, I dunno, but I do know even non-duds do lose the enjoyment of life at a similar age. What usually sticks is family building and such, because it mirrors the experiences I mentioned above.