> the colors of the image noticeably changed when converting to JPEG XL
I’ve seen this with some embedded profiles and lossy conversions, not on lossless though. You could try removing the profile/all metadata and see if that fixes the conversion? I use the regular libjxl encoder though.
I remember trying to do lossles avif but it wasn’t lossless for some reason, as for avif itself, I think it’s better for low quality stuff, but I use jxl for high qualities.
@freezr @lambalicious @maggotbrain
The more you use a tool the less you double check its results, you become complacent with what it does, this is fine for actual tools that produce deterministic results, the slop machine is the opposite of that.