Starting from the 5th last paragraph: The funny thing is that the OOP world have found one way to manage the complexity and the code-bases that grow ugly: They

Starting from the 5th last paragraph: The funny thing is that the OOP world have found one way to manage the complexity and the code-bases that grow ugly: They are using unit tests, and practice the art of writing testable code. ("Testable code" is something that is simple to write unit tests for. )