[fold3]

Even if JPEG-XL could be considered only 'marginally' better than JPEG, and as good or even worse than avif/webP in some specific context, it is unique in the fact that it can also do lossless, HDR, extremely high res, complex color channels, generation loss protection, multi layers, advanced authoring features, etc... It's not a format only meant for the web but plenty of other use cases such as in science, medecine, art print, etc.

And not only that, it's reasonably fast to encode on consumer hardware.

JPEG XL has the ambition to supplant all the images formats of the next 20+years.