Originally Posted by
sleuth
If the MAX were “perfectly stable”, it would have been launched without a system that no other 737 variant has ever needed.
That's...that's not what MCAS does. It compensates for increased lift from the nacelles at high AoA which made the stick input non-linear and makes it linear. That does NOT mean that the aircraft was inherently aerodynamically unstable.
I'm not even sure what "perfectly stable" means. It's certainly not a term I've ever seen in years of studying or working in aerospace.