"Floppy disk-reliant San Francisco train control system spurs concerns of 'catastrophic failure' — and it won't be replaced for at least another decade" https://www.tomshardware.com/tech-industry/floppy-disk-reliant-san-francisco-train-control-system-spurs-concerns-of-catastrophic-failure-and-it-wont-be-replaced-for-at-least-another-decade