It doesn't matter that it's better than WebP, because that isn't the alternative. The alternative that browsers have shipped is AVIF. JPEG XL's advantage over A

It doesn't matter that it's better than WebP, because that isn't the alternative. The alternative that browsers have shipped is AVIF. JPEG XL's advantage over AVIF is less significant. It's not a clear win, but diminishing returns and nice-to-have features vs AVIF's wider deployment and head start in AV1 implementations.