MAX is a lot more efficient than the old NGs or classics (and can also do routes of 757s or 767s if they are thin enough). In a time of reduced demand airlines

MAX is a lot more efficient than the old NGs or classics (and can also do routes of 757s or 767s if they are thin enough). In a time of reduced demand airlines would prefer to park their more fuel-hungry planes and use the more efficient ones. But they can't because it's grounded. And now there are airlines failing left and right with their planes going on the second hand market, back to lessors or are gutted for parts. That's depressing the price of airplanes and spare parts. That can't be good for Boeing either. Would you buy a 15% more efficient car for twice as much?