Curious how much this mod impacts performance, and if it's compatible with Awesome Mod. Also are the new builds compatible with NRaas Story Progression and the High School module?
Yup, it will tax the CPU resources.
But mainly, the lack is because of stuck sims in the background. The bigger the world map and more populated, plus animals, the bigger the risk some sims/animal will stuck somewhere in the world map. Suddenly the game will start to slower and slower as more and more sims stuck in the background.
On the graphics side, some cc are also not well optimized, like some hair. With extreme high polygons and 4k texture.
Actually by understand them, and avoid it, ts3 + kw are quite smooth to play.