I meant if an ancestral family home becomes empty due to deaths, etc. then the now empty house is now considered a Move-in option for any related family members (sims with the same last name) during Story Progression so that they can inherit the ancestral home autonomously (and without paying).
The feature caught my eye as very useful for stories, where some rich old relative dies alone in a mansion and a poor distant relative finds that they are the sole heir. The movie King Ralph comes to mind...
Anyway, this quickly turned from a question to a request, this isn't the place so I'll stop asking.