Rust is supposed to be a better safer C/C++.
Then lot of comments here that games are best done in C++.
So why can't Rust be used for games?
What is really missing beyond an improved ecosystem of tools. All also built on Rust.
But the conversation in the thread is making point that Rust does lack tooling, libraries, that would make lacking fast iteration a valid trade off.
And a common theme is that C++ is better, and last I checked it is also not great at fast iteration.