Earlier quoted context omitted.
These 9 bullet points are far from "not difficult to implement" though.
Well, 2 of them are hard, the others are the kind of thing you get if you let a developer take a week or two to solve them at the beginning, but almost impossible to create after the system is built. So, 3 months of up-front work. It very likely won't break any project/company, but it's enough of a drag that most people will say "fuck it" and not target large enterprises. And, well, there are plenty of other reasons…
Having also sold to large enterprises, you have to be willing to sometimes spend 3-6 month developing a really obscure feature that will only be used by that one customer to get the sale.