I used to work for an automotive paint manufacturer as a color matcher and always got a kick out of OEM Customers thinking they had to lay a thick layer of paint on the parts in order for it to be a good paint job. I have been out of paint for almost ten years, but I believe our goal was to have about 0.8 to 1.2 mils of DFT (Dry Film Thickness) and 0.8 to 1.0 for DFH (Dry Film Hide). That of course is excluding colors that don't hide so well (such as red) then the spec was moved up a little. Anyways, my point is more is not always better - at least for the end user. I know as a paint manufacturer we loved customers who put more paint on their parts, but in order to stay ahead of the competition we taught the customer how to put less paint on their parts. Apple is in the same boat, I'm sure they wouldn't mind making a little heavier iPad Pro and make more money. However, due the competition they wouldn't be able to. Can you imagine how much Apple would be charging for a heavier iPad Pro? In my opinion they already charge way too much, but I think it would even be more ridiculous. Apple is able to set the prices high on the new iPad Pros simply because of supply and demand.