Who is actually still playing with Scenarios? No one, according to EA, since they forgot to add the new Science Baby interaction to those recognized by the first step of Proud Parent.

Are your characters well-to-do, do they have property valued at a tidy sum and also a good house like this, and a generation is growing up in their family? Then it's time to think about who will leave the legacy.

As soon as I heard about scenarios coming into the game and the potential for their customization, the immediate first thing I thought was "this'll make tracking goals for complex legacy challenges a lot easier once people can crack it".