[GuB-42]

> One thing I like about JPEG-XL is that it supports all kinds of weird image formats.

And it is probably the reason why browser vendors disliked it. Lots of complexity, it means a big library, which is high maintenance with a big attack surface. By comparison, webp is "free" if you have webm, as webp is essentially a single frame video.

[edflsafoiewq]

AFAIK browsers do not reuse any VP8 codepath for WebP, they just use libwebp, which decodes lossy images in software. WebP has a non-VP8 lossless mode too. The concern about image format attack surface is also probably because of the recent exploit in libwebp.