There are actually so many sims in this neighborhood (counting all the ones that autogenerated when I created it, because you get all the townies from the prebuilt neighborhood 1 in any new neighborhood you create unless you install particular mods) that I worry it may cause a Big Fiery Ball Visible From Space before I get to generation 10.

Neighborhoods break/get buggy/stop working if you have too many sims in them. For some reason, EAxis. *death glare in the direction of, uh, Redwood City CA according to google*