> The difference is that pilots had been trained and have flown the old one for many years and trained to avoid the unstable conditions for the old 737. I don'

> The difference is that pilots had been trained and have flown the old one for many years and trained to avoid the unstable conditions for the old 737. I don't think that's the case. MCAS was added to satisfy a requirement in the airworthiness certifications that requires positive control forces to increase AoA. The lift generated by the engine nacelles caused this to not be the case at high AoA. None of what has been revealed so far indicates that the pilots had issues related to the symptom, rather they had issues with MCAS. In a way the cure has been worse than the disease.