[GuB-42]

You have to consider that those who write the Rust compiler are experts in Rust, but not necessarily experts in C. So even if writing programs in C may be simpler than in writing programs in Rust for some developers, the opposite is more likely in this case, even before we compare the merits of the respective languages.

[markusde]

This is 100% the case. All of the honest-to-god Rust experts I know work on the compiler in some way. Same goes for Lean, which bootstraps from C as well.