Every (popular) modern operating system sits on decades old foundations written in C that can't just be replaced, so that's not a particularly strong argument.
It's noteworthy that Google is financing the effort to bring Rust to the Linux kernel, that Microsoft is also investing in the language and that there are newer, production usage focused operating systems written in Rust. (eg Hubris [1])
It's noteworthy that Google is financing the effort to bring Rust to the Linux kernel, that Microsoft is also investing in the language and that there are newer, production usage focused operating systems written in Rust. (eg Hubris [1])
[1] https://github.com/oxidecomputer/hubris