Our experiences clearly differ then. And for others as well since it's a common complain.

Countless time I have seen other people complain as well. There are articles about it even. Can't find the YouTube link now but recently a gamedev abandoned Rust due to compilation speed alone because iteration speed was paramount to their creative process.

Handwaving isn't going to make it any better. And thinking Go/TS compilation speed are comparable to Rust is, a handwave and a half to say the least.

Cargo check and friends are subpar for AI because they actually need to run the thing and unit tests for efficient agentic loops.

A single loop might recompile and rerun the application/unit tests enough times that slow compilers like Rust and Scala become detrimental.