>>106483952
No, many internet jpeg 4:2:0 images are encoded via a GPU instead of a CPU. Similar to video, an image GPU encoder like Nvjpeg will either produce unreasonably huge file sizes or piss poor quality. If it's the former then a webp encode can produce an archival quality via lossy compression and reduce the file size by 20-30% because libwebp is exclusively a CPU encoder.

The image codec situation on the web is an absolute fucking mess desu.

https://developer.nvidia.com/nvjpeg