Comment by Cthulhu_

I mean the previous systems do need an overhaul, but that should be and is being done slowly and meticulously. The SpaceX people - whoever they are - will have the credentials to design a new system I'm sure, but probably not without breaking things for years to come.

And they can't just rip it out and replace it, that would likely cripple airlines. Which may be by design of course, but why would they want their own people to no longer be able to fly?