writes:

True but irrelevant to the reality of simulators.

On the contrary, it's extremely important for simulators. Full-motion
simulators are designed specifically to profit maximally from the various
defects of human motion perception. The same defects that result in spatial
disorientation are put to work in simulators to create an extremely persuasive
illusion of real, continuous movement.

The simulator actually uses only acceleration cues and washout to persuade the
human brain that the sim cockpit is actually going somewhere. It works
extremely well.

Again, true but irrelevant to the reality of simulators.

If you can be messed up by turning in a chair with your eyes closed, you can
definitely be persuaded of just about anything with a properly-programmed
motion base reinforced by effective visuals and sound effects.

Anyone ever suffered GLOC in a real airplane?

Sure, but only in aerobatic and fighter aircraft, which are a very tiny
percentage of all the aircraft in service. Most aircraft will disintegrate
long before GLOC occurs.