Let's be realistic - when most users are upset they got a .webp, they're not annoyed because of quality-loss, they're annoyed because they can't immediately use it in many other services & software.
This is still a problem with AVIF, too. Image viewers that support the format often don't support animated AVIFs, and even GitHub still for some godforsaken reason treats .avif files in a repo/PR as binary files instead of images. I think Discord just recently started supporting AVIFs, so that's progress.
