Look what happened when a network and IT issue took out some essential planning software: https://www.travelandleisure.com/travel-news/southwests-computer-outag

Look what happened when a network and IT issue took out some essential planning software: https://www.travelandleisure.com/travel-news/southwests-computer-outage-cancels-hundreds-of-flights https://www.travelandleisure.com/travel-news/southwests-comp... https://www.usatoday.com/story/travel/columnist/cox/2019/04/02/delta-southwest-american-computer-outage-flight-delays/3343814002/ https://www.usatoday.com/story/travel/columnist/cox/2019/04/... google "computer network outage flight disruption" for many, many historical previous examples of similar.