@PalmArrow - It's awesome, there's nobody ever crying and keeping the entire town awake at night (unless you have adults and elders who do this). :p
The standard demographics and stalled pregnancies of the WA worlds no longer apply if one were to make them a homeworld. Those are only for when the actively played sims are visiting while on vacations. Sims born there will be babies and age into their next stages same as anywhere else. There are other reasons why the WA worlds are not well-suited for full time living though; it's really better to add in custom homeworlds that are inspired more or less by the built-in ones and move to or engage active play in those, with or without NRaas Traveler.