Sure, especially for the models you pointed out. But other models... On the other hand with PC laptops it's so common that a part at the display's hinge falls

Sure, especially for the models you pointed out. But other models... On the other hand with PC laptops it's so common that a part at the display's hinge falls off or even a key for that matter. Recently a MacBook Pro fell from 1 meter or so, and the was just a tiny ditch, everything else was still working.