I'm still not convinced this is sound engineering? Shipping two different versions of the software, instead of having some sort of switch you can flip, seems sub-optimal precisely because it increases your exposure to risks like this where you're less able to adapt to unforeseen circumstances because as soon as you wander off the happy path you're in completely uncharted waters. This feels more to me like yet another example of Boeing cutting corners without the benefit of a full understanding of the implications of the decision because their left, right, top, bottom, front, back, charm and strange hands all have no idea what the others are doing.
> Shipping two different versions of the software, instead of having some sort of switch you can flip, seems sub-optimal precisely
Someone on X was saying that NASA's definition of "flight software" includes config files. So it isn't actually the code that needs to be changed, just the config.
I think the need for 4 weeks for a config change is the requirement to test the new config in a simulator (against a long list of scenarios) and have it reviewed and approved by various engineering teams, both Boeing and NASA. Plus likely some margin added.
