I've been building a wordpress plugin that converts JPEG to AVIF on the local server (since everyone wants to sell a service to convert in the cloud).
As a photographer who wants high quality photos on their portfolio website I love how AVIF respects color more the webp.
Superior in file size, image quality, computation required for equivalent quality encoding, no arbitrary resolution caps, progressive decoding which also lets you create 'thumbnails' or resizes by just cutting the byte stream, while also having features to help legacy jpeg files benefit from newer compression losslessly. The only benchmark avif bests at is abhorrently low quality levels that no one genuinely uses.
AVIF already works in all browsers, all sites should support it.
