I don't think those two ideas are in conflict. First, fun and novelty are not always the same thing. I can have fun playing my 5000th hour of Civ VI and it can

I don't think those two ideas are in conflict. First, fun and novelty are not always the same thing. I can have fun playing my 5000th hour of Civ VI and it can indeed fly by, but it doesn't mean something particularly novel happened. Second, the experiencing self and the remembering self can have very different perceptions.