I don't think that they are just marginally better. You are taking for granted that most people are coming from a mouse-oriented workflow. Switching to a keyb

I don't think that they are just marginally better. You are taking for granted that most people are coming from a mouse-oriented workflow. Switching to a keyboard oriented workflow is a very big step. hjkl accomplishes the task of training you to keep your hands on the keyboard. Once you've learned that, you can move to more advanced motions.