To give some perspective: mrustc is written mostly by one person, in C++ and it caught up to 1.39.0 recently - meaning it can "compile" rustc itself (without an

To give some perspective: mrustc is written mostly by one person, in C++ and it caught up to 1.39.0 recently - meaning it can "compile" rustc itself (without any type safety validation) as opposed to arbitrary Rust code. Also C++ compilers are hard too. And optimizing C compilers are hard too...