I use JPEG XL / JXL all of the time, the fact it was "killed off" is news to me. I also use Firefox and not Chrome, so maybe that has something to do with it. If Google decides they want to divide the web by being stupid and failing to follow standards, we have very little path to change that, but it certainly does not create any form of consensus or resolute outcome. Google removing JPEG XL from Chrome because they want to force everyone to use a much worse standard they control (webp) doesn't mean anything about the future of JPEG XL.