> All OS's that use the kernel, Linux need GNU and therefore "most distros" is incorrect - it's all distros.
So what? lots of software is built using make and Bash. You also need Python etc. and lots of other stuff to compile Linux.
> All OS's that use the kernel, Linux need GNU and therefore "most distros" is incorrect - it's all distros.
Its correct. Alpine and some other distros use busybox instead of GNU utils. Chimera Linux uses BSD utilities.
> Linux being included is optional - you can use Hurd, or some BSD kernel instead and the feel of GNU doesn't change in the slightest
I would say having significantly worse hardware support changes the feel quite significantly. So does having a different range of non-GNU utilities, and anything else that relies on compatible syscalls.
There are differences between BSD and GNU utilities and I generally prefer the GNU ones - but its not a huge difference. Even the lightweight busybox versions do not make a huge difference most of the time.