TL;DR: Southwest Airlines is the Texas electrical grid of travel.
"Southwest is highly unusual. Their IT is almost entirely homegrown, with software they built themselves. It’s creaky and antiquated – you’ll observe this if you watch their schedules. They’re irregularly and manually loaded into the system."
"Southwest is essentially a short and medium haul airline. They mostly don’t do long haul services except for Hawaii. Southwest turns aircraft quickly, in less than 30 minutes. They have higher aircraft utilization than any other major US airline. They often run their crews on tight loops where they’re out from home and back the same day so they can save money on accommodating crews who overnight away from their home base. This is all really clever and it works really well until it doesn’t."
via seat31b
https://www.seat31b.com/2022/12/the-great-southwest-meltdown-of-2022/
