Over the past few months, we’ve had some productive conversations with the JPEG-XL team at Google Research around the future of the format in Firefox. Our primary concern has long been the increase...
this has been a bit of a meme, but if you wanted to look at XL as extra large, then that could refer to the max resolution which is far great. I've seen people refere to it as "extra long-term" but I think the real reason is they just wanted to fuck with us