The 8 had the great MCAS crashes (boeing solution ? tell the pilot to turn it off when it happens !), the 7 has anti icing that burnout the engine nacelle and make it fall (boeing solution ? being exempted from the certification requirement of your engines not falling off and we will fix it in a few years !), the 9 has doors that fall off (boeing doesn't even have a solution on that one, but they know others bolts are at risk too since they warned to check the rudder bolts on jan 5), ... At this point it's a systemic problem with the MAX overall. The only one without issue is the 10 and it's because it's not out yet, but Boeing want a fast track on certification for it because obviously they're doing so good with these there is no need to fully check it.
And frankly this time we're talking about the worst of the worst, the basic first step of making airplanes : being able to ensure parts of it doesn't fall off for no reason. This is not a design issue, not a cost cutting "they didn't put enough sensors" reason, this is straight up "their manufacturing is bad and their QA is not able to catch it", ... These things have barely started flying and 5 of those are already affected (well, 6 ...), this is absurd.
Sure MBA taking over tends to kill engineering companies ability to make great product, but even Hewlett Packard is still able to make printers that print (they suck, but that's by choice from them)...