JPEG-XL, WebP or AVIF?

FSF Says Google’s Decision to Deprecate JPEG-XL Emphasizes Need for Browser Choice – Slashdot

Personally, I never used nor remember having saw a JPEG-XL picture.
I see WebP happily replacing Jpeg and PNG and GIF thought.
I just wonder how an open, royalty-free image file format should not be desirable (see https://en.wikipedia.org/wiki/AVIF )