US air traffic control enters the 21st century, starts to abandon floppy disks
(www.theregister.com)
Lol.
Everyone who has used them knows this.
I started out on 8" floppy disk back in the day when disks were actually floppy. Switch to 5.25" and then 3.5" before going to CD-ROMs.
Back then people were storing them in paper sleeves (or cardboard) and your average kid was handling them with dirty hands and ignoring pretty much anything and everything that caused them to degrade including touching the interior film. I fondly remember using the spring loaded shutter or a 3.5" as a fidget toy.
I'm well aware of the failures these things have and the way they are required to be kept to account for that including backups, and care instructions.
The point isn't that they fail. They have known failure rates and known failure causes. Protocols can be put in place to account for literally all of that and this is what makes the medium reliable and cost effective for this use case.
You're talking to someone who was loading navigation data and software updates onto planes with 3.5" floppy until fairly recently in their career.
This is as much about the hardware in use as it is about the storage medium. Upgrading depends on some things.
Cost
Upgradability path availability over full on replacement and the downtime of doing so.
The ability to make what you are upgrading to stable, secure, and backwards compatible to a degree.
All of those things have to be taken into consideration and accounted for.