There are exceptions that prove the rule, but I do think there’s something about the quality of a person’s output that changes as they age. Maybe it’s brain elasticity. Maybe it’s that life changes as we age and things like kids or aging parents or health take precedence.
Regardless, I wish we had a better structure to more gracefully allow the greats to move into teaching or mentorship rather than expecting them to continually release the next great thing. Sports is a good model due to the physicality, if a little on the ruthless end of the spectrum. Most great athletes peak at 26-32 and the ones that continue can still do amazing things but they move into a different role; captains, coaches, commentators, whatever.
Maybe that should apply to games, coding, etc.