@jamesshore@jasongorman The third doubt concerns tests that break when you refactor. If we follow the guideline to write tests first, then it's literally impossible to cause a test to break by changing the production code - whether it's an intentional behavioral change or a refactoring.
I can see value in nullables, but not the kinds of value described in the article. In present company I'm definitely the dumbest person in the room, so please set me straight about this. Thanks. (3/3)