WHY CITIES: SKYLINES 2 PERFORMS POORLY

Summary from the TLDR Web Dev newsletter

This article delves into the technical challenges and issues faced by the game "Cities: Skylines 2." The game's heavy GPU usage is due to the excessive rendering of unnecessary geometry, which is caused by a lack of simplified LOD variants for many of the game's meshes and an apparently untuned culling implementation. The developers likely initially adopted Unity's new technologies like DOTS but had to implement custom solutions for various aspects of the game due to limitations in Unity's integration and technical challenges.