I think we're also getting into that grey area between "should" and "can."
Airplanes "can" (i.e. are physically capable) of significantly more than their performance limits would indicate. That margin is there to allow for things to go wrong (e.g. NWS failing at just the wrong moment). But when in the fantasy world of the sim, those grey spaces can be explored.
Should they be? Dunno. At one level there is a chance to learn something. On the other hand, it could lead to false confidence.
I was just reading about Pinnacle 3701 this morning. That's an adventure that may well have simulated just fine but when the complexities of real world engines and thermal expansion got into it, the result was tragedy. Or Darwin Award, you choose.
As for me, I'd love the chance to sit in a sim and push the aircraft into those non-SOP places just to know.