Not to forget the failure of Frankfurt airport systems earlier this year due to the breakage of a single glass-fibre cable: https://www.dw.com/en/lufthansa-sys

Not to forget the failure of Frankfurt airport systems earlier this year due to the breakage of a single glass-fibre cable: https://www.dw.com/en/lufthansa-system-failure-causes-massive-travel-chaos/a-64705780 https://www.dw.com/en/lufthansa-system-failure-causes-massiv... Though this is not due to outdated IT, but lack of redundancy of a critical component of the system instead.