I don't think we have much deployment of WebP or AVIF hardware decoders yet the formats have widespread use and adoption.
What I am seeing is the high-water-mark for WebP was 3 years ago... It is already dead as a format, but may find a niche use-case for some users.
Consider built-in web-cams that have hardware h264 codecs built-in, as the main cpu just has to stream the data with 1 core. Better battery life for both the sender and receiver.
Keep in mind a single web page may have hundreds of images, and mjpeg streams are still popular in machine-vision use-cases. As most media/gpu hardware is now integrated into most modern browsers, the inertia of "good-enough" will likely remain.. and become permanent as patents expire. =)