> Rust itself parallelizes builds per crate with Cargo, which invokes rustc separately for each compilation unit. Rust’s frontend now has support for running i

> Rust itself parallelizes builds per crate with Cargo, which invokes rustc separately for each compilation unit. Rust’s frontend now has support for running in parallel on nightly (they haven’t announced on the blog yet). But your point stands, Rust got pretty far all these years while keeping things simple and single threaded.