Right, except military aircraft is where FBW was developed and very very much required for performance. Such is not the case for passenger airliners. Only two B

Right, except military aircraft is where FBW was developed and very very much required for performance. Such is not the case for passenger airliners. Only two Boeing planes use FBW, the 777 and 787. Every other plane does not use it including the 737. The MCAS is fundamentally different in that it is a partial FBW system that they tacked on on top of an existing control scheme that is not FBW. It's a random partial FBW component grafted onto something that's completely different. Sort of like a mod chip in a console. It's a hack. To drive home the exact opposite of what you said: "MCAS is abnormal and fundamentally different from many existing systems."