@FDMII, neither me intend to be instructive or to initiate a polemic.
Back then, it was fluid that sent the impulses - today it's electrons.
The hydraulic fluid does not interpret the pilot inputs as flight computers determine the actuators movement
Springs on control column/control wheel circuits & mechanisms provided feedback to the pilot. The AB SS provides such feedback by the same method, (springs) ...
Maybe the active sidestick
What may be confusing to some.... FBW is just another way of moving flight control surfaces
If the pilot releases the stick, the aircraft keeps the pitch until the stick is moved again, then the flight computer moves the actuators without pilot input whatsoever. Also pitch control provides automatic elevator to compensate in turns "You just roll the aircraft and leave it alone"
Airbus said long time ago: "Flying the fly-by wire is similar to driving a stagecoach. Where the coach driver gives a command and the horses take care of the road, the A320 pilot makes a control input and the aircraft takes care of the flight-path. Having been educated in all the permissible speeds, attitudes, and manoeuvres, the A320 will never overspeed, overload, or stall"