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When Boeing 747-400 pilots needed to update their navigation database as late as 2020, a technician would walk onto the flight deck with eight 3.5-inch floppy disks and feed them one at a time into a slot beside the captain’s seat, because recertifying anything newer than the 1989 avionics would have cost hundreds of millions of dollars.

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As recently as 2020, updating a Boeing 747-400’s navigation database meant a technician boarding the aircraft every 28 days with…