Going mostly by a quick check of the wikipedia descriptions JPEGXL seems to live up to the XL part: Larger image sizes, more bits per channel, more channels ... . WebP and AV1F seem to inherit size limitations from their corresponding codecs AV1F for example will start tiling with visible artifacts at 4/8k (depending on direction) to support larger images.
With that Achille's heel in tiling and the slow and PoC-tier encode and decode performance, I'm amazed AVIF has gotten the adoption that it has. Add in that in lossless mode JPEG-XL is almost always smaller, sometimes by up to 4x, and I'm just not sure how it's even a competition. AVIF has so many compromises baked in that didn't need to be made.
