How is jpeg xl “hostile”, it’s just a new format. Does Chrome really need to support every new image format?
Everyone agreed that it was not just a major improvement, but actually the best option out of all the contenders out there. Even the Chrome team. The only ones who didn't agree were the AVIF team at Google, who had developed a competing standard. Well, whoever was on that team had some pull, because not long after Chrome landed JXL support in stable and everything was about to pick up some serious pace, they suddenly landed a commit that reverted everything to do with JXL support in Chrome, and that was that.
An immense, cross-industry effort undone by internal Google politics. That's what's hostile about this situation. JXL is still limping along, but Google's unilateral reversal hurt everyone's confidence in the project but also the entire process. Apparently it doesn't matter what everyone in the world thinks is the most appropriate format. What matters is Lord Google's favour.