Few things to note

1. uutils as a project started back in 2013 as a way to learn Rust, by no means by knowledgeable developers or in a mature language

2. uutils didn't even have a consideration to become a replacement of GNU Coreutils until.... roughly 2021, I think? 2021 is when they started running compliance/compatibility tests, anyway

3. The choice of licensing (made in 2013) effectively forbids them from looking at the original source

> It seems like these supposed coreutils replacements are being written by people who don't know anything about Unix, and also didn't even bother looking at the GNU tools they were supposed to be replacing.

They're a group of people who want to replace pro-user software (GPL) with pro-business software (MIT).

I don't really want them to achieve their goal.

They are deliberately not looking at coreutils code because the Rust versions are released as MIT and they don't want the project contaminated by GPL. I am not fond of this, personally.