As I said, I've been using Indiestone and just recently switched to AM for Story Progression, so of course it was enabled all the time.
I've also tried NRaas Story Progression, but it's not what I wanted. It was on a different savegame though, so this one has just been influenced by Indiestone before.
I guess it's the fact that most houses have no cribs. I play the same neighborhood since I started playing months ago, there are a lot of custom houses placed already, which is why I'm not going to start over with a cribbed-out neighborhood.
Guess I have to place the cribs manually then, unless there's a way to get around the need for a crib in each house to make the Sims procreate.
I get the message that a Sim doesn't have a romance victim every now an then. But sometimes they also find a partner. It just happens a lot less than it was the case with Indiestone.
There are lots of Sims of both sexes without a partner. I don't care if an Elder marries a Young Adult, I just want them to breed.