According to NPR, most ATC towers and other facilities today feel like they’re stuck in the 20th century, with controllers using paper strips and floppy disks to transfer data, while their computers run Windows 95. While this likely saved them from the disastrous CrowdStrike outage that had a massive global impact, their age is a major risk to the nation’s critical infrastructure, with the FAA itself saying that the current state of its hardware is unsustainable.