To strain the car metaphor again: some older cruise control systems actually moved the accelerator pedal, but many modern ones don't. A side-effect of "FADEC" for cars. Will that confuse the driver?
The cruise control for my car is the non-moving gas pedal type like many others. There are times I have forgotten it's still on when the car accelerates by itself and I have to choose to accept the acceleration or cancel it
However the engine goes down to throttle off when I put in the clutch or touch the brakes -- something that may have helped at Congonhas.
Also there's only one engine.