In what way if any is my upthread argument against these being a wide-scale target market not correct?

Or are you still just arguing about (I assert irrelevant) energy efficiency without respect to (I assert relevant) overall efficiency?

Edit: I wasn't trying to make it appear you erred on the points about energy efficiency. I am concerned with what is relevant and didn't think I was attempting to make it appear you made an error. I am urging you to raise the debate to relevant factors because I am most interested in a conclusion so I can move on.