Webp and avif are nice, but I think their inherent base in a video codec makes them a bit funny, e.g. lack of progressive decoding. I await our jxl future. Jpeg is dated and we can do a lot better than a format defined in the early 90s, as venerable as that format may be.
It’s like holding onto mp3 when aac and opus exist, or mpeg2 when hevc exists. The only benefits of the old stuff is less computation required, which only matters if you are using some seriously primitive hardware in 2025.
There are situations where the compression can benefit end users as well, such as loading less image data on a capped cellular plan. Transmission of data is not necessarily free for the recipient, either.