I'm a Systems Reliability and DevOps engineer for Netdata Inc. When not working, I enjoy studying linguistics and history, playing video games, and cooking all kinds of international cuisine.
I would have to say that it probably comes down to two things:
Almost all multimedia software defaults to saving in other formats, and you need extra applications on many systems to even open the file for anything other than viewing. This adds overhead to generating them in the first place (unless you're smart and handle that server-side after upload).
Browser support is, honestly, rather bad. IE is never going to support it, Safari probably wont, and Edge and Firefox have only just added support in the past year. That general lack of support hurts uptake, because it means that to use WebP images and not break the site for a lot of people, you need to have a fallback of some sort, and that's honestly more effort than it's worth for many developers.
I'm a Systems Reliability and DevOps engineer for Netdata Inc. When not working, I enjoy studying linguistics and history, playing video games, and cooking all kinds of international cuisine.
That still falls apart on IE, and it's still more work than many are willing to put in.
Keep in mind that there are an unfortunate number of 'web developers' who only work in stuff like Dreamweaver, and as a result are entirely beholden to how whatever their HTML editor happens to be handles this type of thing.
I would have to say that it probably comes down to two things:
As far as browser support is concerned, the picture tag is the simplest and the best solution for it.
That still falls apart on IE, and it's still more work than many are willing to put in.
Keep in mind that there are an unfortunate number of 'web developers' who only work in stuff like Dreamweaver, and as a result are entirely beholden to how whatever their HTML editor happens to be handles this type of thing.
Thanks for that info.