I expected one of these bad-faith readings, so I can address that Aperture is mentioned once and Iris-WebP is only shown in numbers, because I have access to these encoders and thus they cannot be ignored. The only encoders I heavily advertise here are the incredible open-source AV1 encoders, that I contributed to for free and I think people should use. Also, not sure where you infer that point about WebP; libwebp is a fine encoder.
AVIF does not have artifacts from tiling any more than JPEG XL has artifacts from being JPEG XL; if you read the details post at the bottom, you'd see there's a 0.5-1.0% BD-rate regression with tiles, which is effectively a rounding error.
For progressive, JXL shows a blurry mess for the majority of its decode, while AVIF shows a crisp image that clearly shows what is in the image. Go ahead and try the demo yourself! AVIF also supports more than one layer, but I used Team JXL's image on purpose to show that even there, AVIF looks better for 90% of the decode time. You need to watch what I'm showing you instead of adopting the most bad-faith reading because some things are mentioned.
AVIF does not have artifacts from tiling any more than JPEG XL has artifacts from being JPEG XL; if you read the details post at the bottom, you'd see there's a 0.5-1.0% BD-rate regression with tiles, which is effectively a rounding error.
For progressive, JXL shows a blurry mess for the majority of its decode, while AVIF shows a crisp image that clearly shows what is in the image. Go ahead and try the demo yourself! AVIF also supports more than one layer, but I used Team JXL's image on purpose to show that even there, AVIF looks better for 90% of the decode time. You need to watch what I'm showing you instead of adopting the most bad-faith reading because some things are mentioned.