I read a big opinion piece by some airline regulator guy who went on about his belief Southwest didn't make any significant changes after the disaster in 2022, so we'd see a repeat of the same service meltdown/dysfunction this year.
Southwest's management, of course, claimed the opposite, giving a laundry list of supposed improvements and changes they made to various things.
I'd say this is one of those events that "stress tests" the system they put in place, so it's a great learning experience for Southwest to avoid it happening again, IF they took heed and spent money appropriately to fix it.
It all depends on how committed the current Southwest management (and CEO) are to fixing things.
Southwest Airlines has followed a similar path as many other publicly-owned U.S. companies. The original founders, which included former CEO Herb Kelleher, made Southwest successful by paying attention to the details. Unfortunately, in 2008 Gary Kelley (an accountant / CPA) succeeded Kelleher as CEO. Southwest's slide started from that point as Kelley ignored infrastructure upgrades in favor of maximizing stockholder value. Employees and insiders pleaded with management for years to do something about the company's obsolete scheduling system, and were ignored.
It all fell apart over the 2022 holiday season, just a few months after Kelley retired as CEO. Bob Jordan, who took over as CEO in February 2022, began his career as an IT guy and undoubtedly understood how big of a mess that Southwest's IT systems were in, but didn't have the time to fix things before the meltdown occurred. Kelley is still chairman of the board for Southwest, and the question is how much influence he still has in the company.
If Jordan is actually calling the shots, then there have probably been substantive upgrades to Southwest's internal systems. But if Kelley is the power behind the throne then whatever has been announced may just be window dressing.