I'm not convinced, for a couple of reasons. I haven't found unit testing to help in any way with the complexity of business objects, which are often more-or-les

I'm not convinced, for a couple of reasons. I haven't found unit testing to help in any way with the complexity of business objects, which are often more-or-less dumb beans. When you are handling complex problems, you are going to end up with complex data structures. Unit testing can help with modularizing services, though. The second problem is that whenever you're faced with a large, older codebase, it's often difficult or impossible to refactor away complexity in core components.