>>49894064
it's lossless compression, djxl can reconstruct the original jpgs
find . -type f -name "*.jxl" -print0 | xargs -0 -r -I{} -P`nproc` /bin/sh -c 'f="{}";echo "Converting $f";djxl "${f}" "${f%.*}.jpg" && rm "$f"'
>what is with insisting on nonsensical, unsupported file types
saving space without quality loss
my desktop environment fully supports it so I have no problem switching to it