Let's be clear here, though: it's the airlines who refuse to buy an aircraft with additional training requirements. Pilots can only fly one aircraft type, and retraining to a different type is an expensive proposition. If Boeing could make an aircraft that fit under the 737 type, they really had no choice but to do it.
They also probably could have succeeded, too, if not for other systemic problems within the company.
They also probably could have succeeded, too, if not for other systemic problems within the company.