Re: MCAS is being misportrayed
Yes, absolutely correct. But in Boeing's corporate world, the costs of doing it properly were deemed greater than doing it quickly. Guess which won.
Also note that no model of 737 has more than two AOA sensors, so already the rule-of-three is broken.
A point raised by someone on PPrune is however interesting:
There are literally thousands of conventional 737s of various types still flying around every day, using the same AOA sensors as those fitted to the MAX, so why do we not hear about many failures? It would suggest that in general, the AOA sensors are pretty reliable.
But then that begs the question, what is different about the MAX that caused the AOA sensors on two separate airframes to fail in such quick succession?