Alto family/theories

The Sims 3 is a prequel to The Sims. So, if the Altos pretty much run the town, why aren't they mentioned in any other game? Post your theories here.

Theories
I think, they were run out of town before the beginning of The Sims, for being too evil...

I think that Holly, didn't marry or have any children, so the family ended.

Gunther won to be mayor and they moved to another town.

I think that since Holly is the exact opposite of her parents, she moved away to a different town to get a way from her parents. Plus, the parents died of old age before The Sims. However, if there is a Sims 4, I think the Altos will be in the game.