...using your example of a graphics card - i said that apple has so much money and resources that it would be capable of developing its own custom graphics card that would provide extra graphics capabilities in the MBA 11". it wouldn't be cost effective for them to do so, with margins in mind.
You missed the part where I said without increasing wieght, thickness and running hotter. Its impossible to do this, a discrete GPU will always require more space than a shared card, and it will always run hotter. Apple has the Money to create it's own graphics cards, but money can't overcome certain laws of physics. Just like no amount of money will get a Retina screen in the Mini without it being thicker, heavier and run hotter and still keep the 10 hour battery life.