Some days ago we had a similar discussion here.

For me personally, AVIF is still better, for various reasons (not solely file size compression ratio as such, though this is my number one go-to objective; browser support is also useful but to me is not so important as it is).

I am keeping a close eye on JPEG-XL, but right now I am quite settled on .avif. All my local collection is in .avif, when before it was a mixture of .jpg, .png and a few animated .gifs. From my findings a few years ago, avif is superior to jpg, png and gifs on pretty much everything it matters. On very high compression, though, I also noticed artefacts, but we had that even more so with jpg, and for 1:1 comparable file size, avif beats jpg with both eyes closed.

By the way, great article. I hope he can do another review, based on that blog entry, in, say 3 years. Would be interesting to see how avif and jpeg-xl have improved. In all likelihood I will still keep on using avif, but if jpeg-xl is a real winner in some areas, I may use it. (Lossless is one area where jpeg-xl excels, but I don't need to store satellite data; I want to store old family pictures in an efficient manner, and here it seems avif is better.)