AVIF ( or even AV1 itself ) has had massive increase in quality improvements over the past 6 years. JPEG XL was close to release in 2020 and finalised in 2021. A lot of the sentiments hold true back then.

JPEG XL has always been targeting high quality encoding metric first before the lower end low BPP images, which AV1 excels at with or without the last 6 years of improvements.

The current top comments about MP3 and LAME is again about how encoder extract maximum potential. JPEG XL was may be the best in 2021, but has been fighting for survival since then.

There a lot of different images that JPEG XL encode better. Screenshots with text is known to be not something they have optimised for or think it could be good at. Lossless mode may be better. Edit: As one of the other comment here proved my point.

Had all of these, even just a hint of AVIF improvement be told, may be the sentiments would have been a little different. But then again I am not one who would trust the same people who sold me WebP and AOM roadmaps.

But at least AV2 is coming. And JPEG XL is finally in every browser. Hopefully we can all have something even better in the future.