I want a Macbook Air like laptop, but I don't want it so expensive and designed for Mac OS. I want a cheaper machine running Ubuntu? What's so bad about making

I want a Macbook Air like laptop, but I don't want it so expensive and designed for Mac OS. I want a cheaper machine running Ubuntu? What's so bad about making this available? On a different note, the attempt to show how the internal design of Asus copies that of Apple is laughable. The PCBs look completely different, except for maybe the main fan placement. But think about the space constraints in such a device and it becomes obvious there aren't too many options!