Originally Posted by
kiwi grey
Did Boeing make AoA disagree an extra-cost option on the MAX because it's not available on the NG, and therefore if it was standard on the MAX it would reduce cockpit commonality, make the "it's just the same as an NG, no training required" argument less convincing?
It was available on the NG, flew quite a few of them equipped with the AOA DISAGREE option installed. But apparently, it was a customer option for the NG as well, not standard equipment.