Anecdata in return: I've had the exact opposite, macbook air 2013 issue with a borked keyboard, clearly a manufacturing defect and all they could do is sell me a new one, repairing the old one (which should have been free of charge no matter what the warranty situation) would cost more than it was worth.

My solution: (1) screw Apple, not buying their hardware ever again and (2) use a USB keyboard.