My brother in law is an engineer for a (now) worldwide firm that manufactures commercial lawn mowers, shredders, hedge trimmers, and the like. Everytime they buy a new company, they convert the CAD software, so that every engineer, in one of several states, or two European countries, uses a compatible system.
They do that to build lawn mowers and shredders. And Airbus tried to build the largest passenger airliner in the world without bothering to to take the time and trouble to make sure their CAD programs were compatible? They just allowed everybody in different plants in different nations to work on their own piece of the A 380 and hoped that when they tried to assemble it, the parts fitted together?
Even for a multi-national committee of bureaucrats from European socialist nations, that is a staggeringly bad business decision.
When the 767 and 777 were in the design phase Boeing directed, (dictated!), that if you wanted to be a certified sub then you had to adopt the Boeing standardized CAD CAM software. This way whenver a modification was ordered by Boeing due to operational or regulatory directives, the sub could immediately deal with the issue vis a vis their component. The subs screamed at first but they would come around!
One big happy and those Boeing products can "slip the surley bonds..."
Remember, France is the country that built an aircraft carrier 10 years ago whose launch platform was too short for planes to use it. Not kidding.