Why have stuff like that. I mean we should have 2 sims 1980-2015 each the game would just go quickly
I think you've played long enough to realize that going 35 years game time is a bad idea.
and we would need to run it at 4 months / real life day. Most people can't keep up with that for months at a time.
and having 2 of each type of world helps relieve the overcrowding.