Make default programs support opening webp files and the problem goes away. Until that happens users have every reason to convert files from a format that is a pain in the ass to open.

They do.

Photos in windows supports it. Preview on Mac OS/photos on iOS supports it. I assume anything android would support it as well. Plus every web browser supports it.

Photos in windows supports it

It does? Ive tried to use photos to open it before. Its impossible to associate the file with Photos intuitively. I am about to start directly editing my registry to see if i can do it there.

Looks like maybe only the photos app in Windows 11? My Windows 10 VM is pretty out of date but they could have updated it by now. But who knows with Microsoft.

According to wikipedia almost everyone jumped on board in about 2020.

en.wikipedia.org/wiki/WebP#Support

WebP - Wikipedia