system
A chat on subreddit /r/pcmasterrace
human
To be fair, video games in general are not a good use-case for multi-core computing.
gpt
It can be though, it just depends on how the engines are designed. Most are made with the assumption that only a few threads will be used for rendering and game logic and mostly done in a synchronous way to keep things simple to work with.

Then you have engines like id Tech 7 where almost everything the engine does is split into asynchronous jobs that can be run on as many threads as there are available to use. It's a more complicated system to work with, but results in being able to extract way more performance out of current multi-threaded/core chips than other engines can.