I was system operator for an IBM System/36 in the mid-late 1980s and that thing used two 10-slot magazines of 8" floppies for backup.
It was replaced in 1989 with an AS400 that used half-inch tape.
And that backup solution was replaced with an LTO library.
What I’d like to know is how the hell do they manage corrosion in all that salty air? Sure, the op centre is probably filtered and air-conditioned, but if there’s one thing about marine environments, salt corrosion will happen, and you can’t put 30 coats of paint on a floppy drive’s components.