Oh I agree, worlds are too complicated enough without worrying about custom EP combinations! XD. Even now I’m still worried that if I install a new EP or even patch the game I’ll bork the project forever. It should be okay with later EPs but if you didn’t have the EPs I have, from what I understand it will just replace the specific objects or remove them, like lots. I can make the world with the EPs i have, then update later for other EPs for my personal game. I may do that and see how it works.
I like populating hoods with my sims too, but I read some people don’t want to bother. I’d sooner leave it empty, but I can see the appeal of playing with “premade” sims. :D
Thank you very much for answering!