I've seen comments stating that the ship stabilises if you stop moving the mouse in relative - which is false, but a common misconception.
If you let go of a joystick, it will return to the central position. In FA-On, this cancels the ship's rotation. In FA-Off, it doesn't.
If you let go of the mouse in relative and FA-Off, it doesn't cancel the rotation. Therefore the claim that it's equivalent to using a joystick in FA-On is simply false.
I understand the point that the joystick user has to go back past the central point to begin applying opposite thrust, and the relative-mouse user does not (because there is no "central point"), but that is a separate argument.
If you let go of a joystick, it will return to the central position. In FA-On, this cancels the ship's rotation. In FA-Off, it doesn't.
If you let go of the mouse in relative and FA-Off, it doesn't cancel the rotation. Therefore the claim that it's equivalent to using a joystick in FA-On is simply false.
I understand the point that the joystick user has to go back past the central point to begin applying opposite thrust, and the relative-mouse user does not (because there is no "central point"), but that is a separate argument.