Re: Most of these are "screw the coder" misfeatures
Delegation does not help at all if you cannot use your own class in place of the other, which is the case if there is no common interface to implement. Of course, with your own code and sanely written libraries/frameworks, this is not something you'd be forced to do in the first place, but unfortunately a lot of stuff you encounter in enterprise development is horribly written/structured - look no further than some of Oracle's own products. Without the ability to replace an instance with a subclass of your own, you're screwed.
Biting the hand that feeds IT
