it didn't go anywhere it's mostly just design docs and a bit of code that generates planet data based on historical events (ie. this planet has underground fauna, which evolved when a chemical saturation event made the surface unlivable, which was caused by seismic activity etc)
btw been interested in the concept of "alibis" in procgen ie. thinking about a Sims-like where you get to know some random street townie and their generation refinement process kicks in like *gestures at random unassigned house* "oh yeah i've been living there the whole time btw"