I suspect it's the same reasons nuclear launch facilities use floppy disks -- the solution is approved, and getting a new solution approved is viewed as too expensive/infeasible.
Not saying the argument is valid, just that it may be the reason.
Not saying the argument is valid, just that it may be the reason.
But OK, I assume they still pass whatever dry-run test procedures exist. But if it is true that they are based on floppy-disks, then I don't think sticking with them is a net win for reliability and safety.
Bits rot, especially on floppies. So if they are still using them they have created procedures for refreshing the bits from backups. By now the floppies might be little more than ceremonial objects inside the systems that really determine the launch procedure.
And those systems would have evolved informally over time and might be ever-changing, poorly understood and poorly tested.