It's been a long time since I last had Aerofly FS1 installed, so I don't really recall if this was modelled, but I guess it was...
In AEFS2 the resistance of all aircraft to stress when operating way above their limits is infinite. It reminds me of MS FLIGHT.
I can take the F4-U, for instance, to 25000 ft and from there dive at max speed and above and then fully pull on the stick to recover and gladly continue flying.
I would like to see some damage due to stress implemented in the aircraft.