But what's the cost of reinventing the wheel? The aircraft will cost more up front. You now need all this new regulation. Insurance has a big question mark over it. Software development will need a complete and total cultural change and become Human Factors critical. No more of this "just ship it and we'll patch it up when they find the bugs in the middle of the night over the ocean" The cost of that will be exponential to the current "lowest bidder" mentality.
In reality I think it will ultimately achieve nothing but just shift a whole bunch of risk and cost around from one area to another.