Icepack;
Re, "Sim's are no use as they handle the same at 5000 ft as they do at 41000 ft. which actually i find criminal, as the authorities don't insist the algorithms being programed. "
Are you certain of this? There are areas in which simulators do not have data (behaviour at/during the stall, discussed in earlier threads and verified with CAE) but I would have thought that in Level D sims at least, aircraft behaviour at high altitudes vice low altitudes would have been easily reproduced and even required. Just one example..., one may pull hard on the controls, (here, the side stick), and may approach or even exceed the stall AoA in thinner air while at 5000ft that likely isn' t the case. I would think that would have to be reproduced accurately.