Trained or not, it makes no difference to be honest.
The keyboard designed for the new range of MBA and the 11" in particular are drastically different to the previous MBA and the MBP. If you don't believe me go and have a close look at the new MBA and one of the aforementioned machines and look at the height of the keys for starters, that will give you your first clue to the difference in keyboard profile. Now those that are slightly more computer literate can tear their machine down to it's component parts, this is not for the faint hearted and I don't recommend you do, but if you did, the keyboard is one of the last elements to be removed after the batteries, MLB, fan and trackpad. You'll notice how there is no space between the keyboard and other internal hardware, then you'll notice how thin the keyboard assembly is, and that it also lacks the additional layers required to illuminate it that you would find as part of the keyboard assembly on the old MBA. For the record it would also require sensors, ribbon cable, etc etc but I think you get the picture.
Now thinking if I were Apple and wanted to install one of these backlit keyboards in the next MBA how could it be done. I'll tell you how, you'd need to increase the height profile of the keyboard to allow the additional parts in behind it, this keyboard design change would require rebating the screen back by the same depth (to prevent key foul on the screen with the lid closed), which in turn would require the thickness of the lid to be increased to allow for the rebate adjustment, resulting in an overall increase in the depth of the machine itself. Not something Apple will do, as the product cost relies on the unibody design being tooled for it's planned life, not being replaced half way through to accommodate minor internal hardware alterations like adding back a backlit keyboard.
Some of Apple's key design criteria for the MBA were to increase battery time (in use), reduce weight, and reduce overall size. They have made a very very big deal of the overall size of the new range of MBA, and to quote "it's a brand new machine" never a reference back to the old MBA, which is unusual for Apple.
You can tell me i'm wrong, but it is quite obvious to those with a bit of knowledge of these things why Apple removed hardware like the backlit keyboard, and why it isn't likely to be added back too easily unless the tech changes or the overall product design changes, the latter certainly wont happen in the near future.