40 degree flap isn't dangerous either - I'd very much agree with PilotDAR on that basis. Anecdotally I have been lead to believe the reason that the 40 setting went away was the full flap climb out requirement. Limiting the flap to 30 allowed a higher useful load whilst still being able to climb out at 'full' flap. Possibly urban legend, but in any case, I'd take a '40' model over the 30 any day.