@isadora I worked on a farming sim for years, and for me the worst part was vehicle "AI" - harvesters and tractors navigating on the same field (without colliding and with minimal crop destruction), tractors with trailers driving next to harvesters to empty them, turning maneuvers, all that was a fucking nightmare.
OTOH, we didn't really have NPCs that did any interesting things, apart from walking around the village on the sidewalks, so IDK how implementing that is like