If compare to HEIC and other formats JPEG XL seems like best candidate to replace JPEG compression in PLD yet.
It also makes sense to add JPEG XL format in Web Export panel, so user could adjust visual quality quick and easy.
- JPEG XL can do lossless image compression in a way that beats existing formats (in particular PNG) in all ways: it can be faster to encode, produces smaller files, and more features are available (e.g. CMYK, layers, and 32-bit floating point samples). As this is mostly relevant for authoring workflows, not so much for the web delivery use case, I will not dwell on this topic too much more, but it sure is a rather important ‘benefit’ of JPEG XL as a format in general.
- Opposite to HEIC it is more-less universal and open option that don't have strange artificial limitations.
- Visually i can't see difference between heavy processed 16-bit JPEG XL from 16-bit uncompressed source. So high bit depth support is way more important than lossless compression.
- If compression set to 99% or less it works really fast.
- If compression set to 100% or less it works very slow. (bug in decoder or in PhotoLine ?)
- 16-bit JPEG XL compression 98% produce same file size as 16-bit JPEG2000 compression 99%, but compression speed is about 5x faster.
- JPEG XL is pretty new format and seems there are many bugreports in development page. Have no idea if they are critical or not.
- There is no native macOS Finder thumbnails generator, but there is a QuickLook plugin project for macOS Finder thumbnails. Unfortunately it works only with macOS 11+
https://github.com/yllan/JXLook