You can't certify the plane without MCAS or some replacement. MCAS wasn't added because the plane didn't fly the same as the 737. MCAS was added because the pl

You can't certify the plane without MCAS or some replacement. MCAS wasn't added because the plane didn't fly the same as the 737. MCAS was added because the plane didn't fly the same as all other certifiable aircraft. It doesn't meet FAA regulations on how the controls need to feel when approaching stall. The type rating mess only caused Boeing to hide MCAS from pilots. This triggered various dangerous design decisions, including designing it to be impossible to disable and making it only take data from one sensor.