Delta Air Lines experienced a massive disruption to its global service after a power loss in their Atlanta data center, causing 15,000 daily flights to be cancelled. However, this was not an isolated incident, as other airlines such as Southwest Airlines and United Continental also suffered from network failures. The industry's reliance on aging infrastructure, primarily IBM's Transaction Processing Facility operating system created in the 1960s, has been cited as a cause of these outages. Nevertheless, falling oil prices have provided airlines with increased cash reserves, allowing them to invest in more substantial technology overhauls. Signs of this shift are visible in Delta's decision to bring its core infrastructure in-house and Southwest's overhaul of its reservations system through partnering with MongoDB. Other airlines, such as China Eastern Airlines and the 5th largest airline in the world, have also adopted modern technologies like MongoDB to improve their systems' fault tolerance and scalability. These upgrades have enabled them to provide faster service, reduce downtime, and enhance customer experience. The industry is slowly shifting its focus towards more agile and fault-tolerant systems, driven by the need for reliability in a highly competitive market prone to existential threats.