I'm definitely a different duck than lots of people because I do a rotational play with EVERY family. Basically how I do so is that everyone has a number, and I use a website to randomly pick one. I play around 5 days for a household without kids and 15-ish for a family. I should probably equalize that, I'd get a lot more milage out of the non-family households. Long timeline and aging off for the non-active household.
There's some families I've managed to visit a lot, like say the Munch's and the Rasoya's, and some I've haven't or hardly ever touched (looking at you Roomies) but hey.
Within those files is also some special cases of other video-game characters that are basically immortal. Because my inital files for the Sims 4 was playing with some of those and I felt uncomfortable with the push to make families with them or else I'd be face the prospect of them dying without heirs. Sims is family-propoganda I tells ya!
Really should figure up a rundown of the households and their histories somewhere.