I recall the shift from jpeg to png as a web default. Many sites would not accept one or the other. Eventually, png became more and more popular and "won." The

I recall the shift from jpeg to png as a web default. Many sites would not accept one or the other. Eventually, png became more and more popular and "won." The same can happen with other formats, but it takes time. Any any site/org/company that deals with these uploads or displaying the images needs to be clear on what they can do and error out early when they can't do it. I recall "sorry, you tried to upload a png file, we only support jpeg" messages with links to details about the difference and how to convert them. And mime inspection worked back then too, so changing the extension was not good enough.