I think if they did that, nobody would use it. And anyway, from the article:

> Many of the programs you use already support the new PNG spec: Chrome, Safari, Firefox, iOS/macOS, Photoshop, DaVinci Resolve, Avid Media Composer...

It might be too late to rename png to .png4 or something. It sounds like we're using the new png standard already in a lot of our software.