The trouble there is that so much hardware and infrastructure is built for IPv4.<p>With file formats however, it&#x27;s only software.  Add supports to mainstream browers and operating systems and you&#x27;ve got a fully functional new format.  Look how quickly webm came into existence.<p>JPEG is an oldy, but support for a new format that does all JPEG does is certainly possible, and it would slowly win out.  Much like how png killed gif (until social media brought it roaring back... egh).