The software for the Space Shuttles was written in the late 70’s. It was already obsolete by the time they got to the launching pad.
I have a friend who worked at Redstone and he helped write the code.
That's one of the huge advantages these commercial outfits have over NASA. They don't have to go through the cumbersome and glacially slow federal procurement process with all it's arcane rules, or deal with bids and the inevitable protests and court battles from companies that lose.
Basically Elon Musk or whoever says, "I want a glass cockpit with the latest and greatest software." and somebody immediately runs out and hires the best engineers and programmers to make it happen.