Written in Rust. Hmm.
SerenityOS is written in C++.
I'd love some kind of meta-language that is easy to read and write, easy to maintain - but fast. C, C++, Rust etc... are not that easy to read, write and maintain.
fast necessitates manual control -> more semantics for low level control) that need to be expressible, ie: more complex
easy to understand, maintain -> computer does more work for you to "figure things out" in a way that simply can't be optimal under al conditions.
TLDR: what you're asking for isn't really possible without some form of AGI
Being maintainable comes down to code quality, comments, and documentation. These are thing that I really want to emphasize for this project but for now I'm just one guy and it's very early days so I have to focus developing core kernel components first.