> There is more than one project to rewrite the GNU utils in Rust?
coreutils != posixutils
That is, GNU coreutils is POSIX + their own extensions. So there’s only one project (that I’m aware of) that’s trying to rewrite the GNU coreutils, and that’s the uutils project.
However, there is also this project, which is trying to implement the various POSIX utils, and the POSIX parts only.