@Playalot Thank you for your very detailed response.
Actually, I went back and read your posts in the IDC thread earlier about how your sim would make good friends during the day who would then get culled at midnight.
Then I posted my questions about culling, wondering if the game had improved since the time of your post (apparently not).
You're right about my being able to finish my dynasty as it stands now. I still have some townies in houses and don't foresee any issues with meeting Gen8's friendship requirements.
Yet it's so annoying to open the relationship panel and see more ghosts than sims! My founder has over 100 ghosts in his panel and only 19 living sims.
But I agree; the culling can be managed by working around it; there's no need to use a mod.
Thank you for the tip on using Manage Households for non-challenge saves and the info about the 220-sim cap.
I just don't understand why the game would have an achievement for 25-26 generations (I forget how many) if we can't preserve the family tree and friendships without using Manage Household.
Or maybe that's how Manage Households is supposed to work.