Quake is to some extend a reference implementation of a modern FPS-type game. Because it is open source and because it is well written.

Now I'm no hero in C (doing slightly better in C++). But I have quite some experience with Rust. I rather read Quake in Rust than in C. So I'm happy with the port.

Also, you talk down on the effort but porting over a codebase this size is no small feat even with the help of LLMs. I think the "author" (human creator) learned a thing or two along the way.