That's correct, but it's important to keep in mind that JPEG XL is tuned for high quality images. If your baseline is heavily compressed JPEGs or AVIF images, s

That's correct, but it's important to keep in mind that JPEG XL is tuned for high quality images. If your baseline is heavily compressed JPEGs or AVIF images, switching to JPEG XL might save you nothing at all. However, if you're starting from 4+ MB high resolution JPEGs, and looking to save bandwidth while keeping the same quality, JPEG XL is vastly superior to anything else (including AVIF and WEBP).