For Alaska, that is not accurate. They did a complete migration off any on premise data center around 2023 for Sabre* there are on prem DC for other things but not for GDS.

Hawaiian uses Amadeus, so also not any intergration issue.

What happens and why Alaska usually has the most issues in October is it's PIP season, some people got culled. Also some new hires too.

This specific ITS though pushed through a change without proper CM/CAB earlier this week. But that's all I can write