US minuteman nukes were also reliant on floppies until recently.

That is the hyper-reliablity case that I was referring to. In extreme cases like that, the systems (should) go through millions of dollars in testing, taking hundreds of hours. You can’t replace one bit without retesting the entire system across every single platform where it is implemented. (That is the logic anyway.)

Your average military equipment is not glamorous. The tech is raw steel, lots of explosives and a fuck ton of duct tape and prayers. (Excluding some types of ordinance, actually. Some of that stuff is insanely complicated.)

Also, please excuse some of my rough exaggeration. There is truth behind it but it’s probably not as shitty as I make it sound. (Old habit.)