But that ties into what I'm saying - trying to 'oxidise' a system written in C that already works.
Note, that the answer doesn't say that it can't benefit security, which would be a principal argument for OpenBSD. It brings side reasons as to why it's not easy to do (like integrated tools, developers' availability and so on).
Oh wait, that's right, none of them has even gotten around to writing a replacement for ls, grep, .....
Some did: https://www.redox-os.org
> Oh wait, that's right, none of them has even gotten around to writing a replacement for ls, grep,
They did that for some utils: https://github.com/redox-os/coreutils
> This seems to be a more reasonable approach that trying to force an existing operating system to adopt their language.
I don't think anyone is forcing to adopt anything here. The question was about integrating languages like Rust in OpenBSD.
Who exactly? Can you actually point to anyone making this desire known in earnest?