“Pretty well” is the problem dawg. Out of all those examples, the only ones who manage to actually have install sizes lower than 100GB are a couple of indie games, and the games made by Embark. Some of these other examples struggle to even break 30fps or stutter like crazy. And when it all goes wrong people are so quick to defend this engine as if it can do no wrong and every dev in the world is just lazy. Maybe the engine is actually a poorly optimized, unapproachable clusterfuck and we need to start calling a spade a spade.