But my founder has already completed the 'quest'!
It's not fair lol (Just kidding)
This is just another reason why this is a challenge. To keep everyone's supermax skills unique to only them, to keep their careers unique, to keep feeding them ambrosia, to get everything done before the founder dies, to remember a portrait for every life stage for 8 generations. That's at least 50 weeks worth of work right there.
It's hard and towards the end it's boring. Just be wary of time machines. Once they have nothing to do give them something they don't mind doing all day like playing a video game, an activity related to their skill or just have them watching tv. They will sit there all day and not gain skill points or get into trouble.