Okay, so I was wrong about no airline bothering with breaking ground on SAF during the holiday season:)
https://www.theguardian.com/business/2023/nov/28/transatlantic-flight-sustainable-jet-fuel-virgin-atlantic-saf
But I continue to believe Cemvita won't have the SAF ready before the end of the year.
I think Saudi Arabia is ready, but their hands are tied with the Israel/Hamas war going on in Gaza. And I don't see that being resolved in the next month.