It's true that JPEG will hang around purely because a lot of software and hardware supports it and they can't all be easily updated. But existing JPEG images ca

It's true that JPEG will hang around purely because a lot of software and hardware supports it and they can't all be easily updated. But existing JPEG images can be losslessly (and reversibly) transcoded to JPEG XL and you still get reduced file sizes: https://cloudinary.com/blog/legacy_and_transition_creating_a_new_universal_image_codec https://cloudinary.com/blog/legacy_and_transition_creating_a... JPEG XL will be successful for this reason alone.