The way I understand it is today is when I board on an Airbus I enter an hybrid of a mechanical and digital machine. I understand there is a lot of complex and sensitive software embedded/hosted on that plane that hopefully are not gonna kill me.
So computers are actually core to their business. They probably almost invented things like PLM too.
Nothing Airbus does is easy, this is why there are only about 2 companies like that in the world. This is why I do not see why their hosting have to be outsourced...