All language designers are arrogant. Goes with the territory.
And don't tell me there isn't one bit of difference between null and space, because that's exactly how much difference there is.
It's there as a sop to former Ada programmers.
I am not a sort of person who wants to run a company.
It won't be covered in the book. The source code has to be useful for something, after all.
People get annoyed when you try to debug them.