I disagree with the author here, and while I admit that Null failures are a pain, it's not true to say they don't exist in other languages. "Maybe" and "Option" etc may force you to deal with them before they will compile, but that's not the same thing as saying the concept of Null does not exist in those languages. I'm sure there are some languages out there without any concept of Null, but they would have their own shortcomings for the lack of it.
It's also wrong to suggest that Null has no place in "logic". Boolean logic is one type of logic, but it's not the only type.
Finally, the examples of how Null works in various languages are really poor. "Why doesn't Ruby coerce nil into zero?" Because it doesn't coerce any types implicitly. Why should nil be the exception? How is that expectation "logical"?
It's also wrong to suggest that Null has no place in "logic". Boolean logic is one type of logic, but it's not the only type.
Finally, the examples of how Null works in various languages are really poor. "Why doesn't Ruby coerce nil into zero?" Because it doesn't coerce any types implicitly. Why should nil be the exception? How is that expectation "logical"?