A system only needs one programming language to be useful, and when there's only one it's basically always C.
A C compiler is also relatively easy to implement (compared to a Rust compiler) if you're making your own hobby OS with its own C compiler and libc.
alt Hacker News
A C compiler is also relatively easy to implement (compared to a Rust compiler) if you're making your own hobby OS with its own C compiler and libc.