The 737, like all large commercial aircraft, also requires an artificial control feel force feedback system in order to meet design requirements. It has always

The 737, like all large commercial aircraft, also requires an artificial control feel force feedback system in order to meet design requirements. It has always had one going back to 1967. A question that has never been adequately answered: if MCAS was conceived of in order to meet the 14 CFR Part 25.143 requirements for a positive control force feedback gradient, why did Boeing not modify the existing Elevator Differential Feel Computer (a mechanical/hydraulic computer with no electronic components) instead of inventing a half-assed, undocumented, slow moving, open-loop fly-by-wire contraption using the trim tab actuator?