The jxl compression would compute a base for all sub-images and create better diffs amongst them. The current encoder doesn't support that yet. With my tiff lz

The jxl compression would compute a base for all sub-images and create better diffs amongst them. The current encoder doesn't support that yet. With my tiff lzw:2 it only takes the diffs for 2 consecutive lines per each sub-image, which is a shame. But still 50% compression. With jxl it would compress down to 10% or more with a sub-image base.