A lot of people use it to promote their art or to share screencaps/gifs/clips of movies, so I think people would get pretty cranky if the image files were overl

A lot of people use it to promote their art or to share screencaps/gifs/clips of movies, so I think people would get pretty cranky if the image files were overly compressed (unless it's the magic kind of compression that doesn't cost any fidelity. I don't really understand how compression works). That's without getting into video content.