JPEG XL isn't from the same team as WebP 2.0 and arguably AVIF is. It's a combination of the team behind Brotli/Guetzli/Brunsli and Jon Sneyes, inventor of FLIF.
JPEG XL is simple enough to be written cleanly and largely from scratch, instead of being based on a fork of the crusty VP8 codebase.
JPEG XL is simple enough to be written cleanly and largely from scratch, instead of being based on a fork of the crusty VP8 codebase.