IMO most of JPEG-XL's value is in the feature set. Having a format that can do transparency, proper HDR, and is efficient for everything from icons to pixel art

IMO most of JPEG-XL's value is in the feature set. Having a format that can do transparency, proper HDR, and is efficient for everything from icons to pixel art to photographs is a really strong value prop. JPEG, Webp, and AVIF all have some of these, but none have all. (AVIF is the closest, but as a video codec it still has a pretty significant overhead for small images like icons).