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...

* They were all killed. :) I hate them anyway!!!

* 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 have move away to a different town to get a way from their parents. Plus, the parents die of old age before The Sims. However, if there is a Sims 4, I think the Altos will be in the game.