The original answer was taken out of context.
This answers your questions regarding xDrive.
But basically customers want All Wheel Drive and they want weight loss too, but you cant have one without the other.
But if you want xDrive there will be other choices to accompany the X5M and X6M , we are looking at a potential X1M.
But at the end there is a nice prelude there to Carbon Fibre roofs.
Make of that ,what you can?