@dushman GNU coreutils is only one package out of 388; https://www.gnu.org/software/

>Hurd is unusable for anything serious
Hurd can boot straight into GNU Emacs, which is all you need to real serious computation.

>You can replace the GNU coreutils with busybox or ones from the BSDs and have a complete system.
You cannot, as coreutils is only one small part of a complete system - BusyBox/Linux distros are dependent on GNU software and GNU libraries to function.

Even the BSD's are dependent on GNU software, even though they dislike the freedom and seek to replace the freedom with versions that are proprietarized, they still use GNU.

A kernel is like a transmission in a car - important if you want the engines power to be delivered to the wheels (or processes scheduled), but clearly less important than the rest of the GNU/Car, which has the GNU/Frame (glibc), GNU/Starter (Grub) and GNU/Controls (Bash) etc.

@mischievoustomato >replace the gnu coreutils with the rust ones. imagine that'd happen to gnu lol
Adopting an inferior coreutils will do absolutely nothing to GNU, as the remaining GNU software would still be in use.