I have not read the GNU docs much, only as needed, now and then, because, as I said, my usage of Unix predates the creation of GNU / Linux by some years, and I had spent tons of time reading Unix man pages and other docs earlier, and tons of time actually using various Unix versions too, in production, over multiple years, including the shell (sh before bash, even, and awk, sed, (e)grep, and friends, aka lots of Unix filters, including custom hand-written ones in C, and combinations of all of the above, as all red-blooded Unix folks did for years, and still do :)

See "The Unix Programming Environment" book by Kernighan and Pike for the best experience of the gestalt of Unix, other than real life usage with the guidance of a friendly expert.

Nothing against GNU, they have done tons of really good work.

And, for example, there is a lot of appreciation and regard for GNU, Linux and other free software and open source stuff in India, and interestingly, somewhat more so in Kerala, an Indian state with a more communist (politically) and hence somewhat / sometimes more egalitarian approach than other states. And they don't just appreciate, many of them also contribute to such efforts. People in other parts of India also do, some, of course.

I'm not from there, but I have family and friends from there, which is one reason I know about this.

Cheers.