Yes and PNG is an actual file format widely used and available. SIX isnt. And sure if you want to invent mythical SIX file formats, I can just as well invent mythical KITTY_IMAGE file formats that you can just cat into a terminal, without needing even base64 or bash. The point is, as it stands, the kitty image protocol is FAR easier to USE to display images than sixels. Trying to claim otherwise is just ridiculous. Indeed, if you want to talk of ease of use, the iterm2 protocol is even easier, since iterm supports more image formats without requiring conversion to RGB.

Good that you are out, hopefully you are out of trying to shill sixels as well.