The current GNU coreutils have been C for decades, and I am not aware of an instance where this was a limiting factor. The GNU coreutils can still be bundled with proprietary software. Just like some Linux distributions used to come bundled with proprietary Nvidia drivers.

Can you possibly find an example where the Licensing the rust coreutils under the GPL would be an issue? Or actually any example at all of where using the GPL is a bad thing?

MIT License isn’t giving up Open Source, as all Open Source projects with MIT prove it.

I literally just described an example of it giving up open source. Any project under the MIT (https://directory.fsf.org/wiki/License:Expat) license can become proprietary at any time and all development is no longer open source! How is my example of apple using FreeBSD without contributing not an example of giving up open source? If you would like I can find more examples. So far you havn’t given me any for your own evidence but I would like some so I can understand your argument better.

Also applogies for the late replies, I hope you don’t mind too much.