Technology

I think you forgot a pretty crucial point, that it is also royalty free.

I'll go back and add it - there's a lot of great stuff that I didn't mention just for brevity. The biggest royalty concern is HEIC atm, which is basically a nonstarter. I'm not sure how the licensing on the other free formats compares against JXL.

I wonder how the Chrome team managed to test it so poorly they claimed it wasn’t worth it? Just the versatility alone should make it a no-brainer.

Make no mistake, it was a political killing. They didn't kill it because of perceived performance, they killed it ahead of their public benchmarks because of "lack of interest". Their cited lack of interest was determined after only a few months of the format going live behind opt-in experimental flags, and once they made their original decision, just about every large tech company spoke up in favor of JXL against Google's decision on their bugtracker, including Adobe, Intel, Nvidia, Facebook, Shopify, and Flickr. Google still plugged their ears and pretended no one was interested.

Google is trying to push WebP (2.0?) and AVIF, and using their browser marketshare to kill JXL and make that happen. Why they went through all this trouble to kill a format that they themselves co-developed, I really have no idea. I follow JXL relatively closely and I still am not 100% sure why they went through with this. All I know is that the decision was politically-motivated, and without applying political/ecosystem pressure they're not going to change their minds with data.

Edit: by the way, the last few comments still trickling in on that bugtracker are a great read, especially #406. #406 reads so similarly to my comment I'm surprised I didn't write it, haha.