That's an ideal scenario, though, that implies that all of your view/controller/model through-lines can be isolated vertically from each other. In fact, control

That's an ideal scenario, though, that implies that all of your view/controller/model through-lines can be isolated vertically from each other. In fact, controllers often coordinate the actions of multiple models to achieve higher-level objectives, and it's at this point that the relatively greater cohesiveness of layers versus features becomes apparent.