Also jpeg XL is just much better than webp.
Google Research develops and maintains JPEG XL, currently main focus on improving streaming encoding -- to use much less memory during the encoding process.
Google Chrome added and then removed experimental support of JPEG XL from Chrome. This has caused discussion in the related bugs.
https://bugs.chromium.org/p/chromium/issues/detail?id=145180... https://bugs.chromium.org/p/chromium/issues/detail?id=117805...
Feature-wise, maybe (transparency, animation). Compression-wise, not really (better at low qualities because the artifacts are somewhat less objectionable than JPEG’s, but worse at high qualities).
Lossless WebP (practically a separate codec) is nice though, albeit 8-bit only.