[nullnullnull]

I didn't say anything about easy or hard (again you are injecting). Yes kernel programming is hard. However it is not "impossible" :

case in point-> The Elements of Computing Systems: Building a Modern Computer from First Principles (by Noam Nisan).

Your average CS student can do this (from nand to tetris). Kernel development is hard (without a doubt), but not impossible.

"The important stuff gets done by truly outstanding people. To deny this is nothing but laughable."

Once again, you are adding things that do not exist in the original article.

[factorial]

You must be joking! The book you are referring to accompanies a course called "CS116". What about digging through some graduate school course catalogues instead?

Of course Kernel development isn't impossible. Otherwise, there wouldn't be any kernels in the first place. But of course it is the domain of a rather small number of people.

[nullnullnull]

I'm well aware of the course, what exactly is your point? Your second part of the sentence makes no sense either, what is your point?

I've demonstrated that kernel development, although "hard" is possible even by students (hence the reference to the book and its related course).

You have offered nothing in response.