Comments by "Mikko Rantalainen" (@MikkoRantalainen) on "Boeing’s Downfall - Going for the MAX!!" video.

Boeing couldn't add extra information for pilots about MCAS or make it redundant because either of those actions would have meant it couldn't have had the same type certificate as non-MAX 737. And as this was already promised by the marketing department, they choose to take the risks. I see this as yet another example how you shouldn't give marketing department any ability to override engineering. Unless we see a change in this part of the Boeing culture, there's no way for Boeing to build reliable aircraft in long term.
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@Maker_Mikey I agree. The trick that Boeing did with MCAS was that they declared it is not a critical system so it didn't matter if it had failure rate above 10e-9. In practice, it was a critical system demonstrated by two big crashes.
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@johngunderson5463 MCAS was pretended to be an aid with an off switch, not a critical system, so it couldn't cause catastrophic outcome in theory. And you cannot have no single failure if you consider failures such as tail snapping off the plane. You have to draw a line to some probability, always.
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