I don't think I agree; there are plenty of video and audio formats that exist that were lossless that had traction in the archival and library worlds. Sure, that's not nearly as big of an audience as something like YouTube or Instagram, but it's not nothing.
I could totally see a universe where something like FLIF becoming a de-facto standard in image archiving, particularly for extremely large images. 33% smaller than PNG is a measurably savings in image archiving.
I forgot to mention, there are plenty of non-archival formats that get traction even with incomplete browser support. The MKV container format is only partially supported in browsers (with WebM), but it's still a popular format for any kind of home video.
I could totally see a universe where something like FLIF becoming a de-facto standard in image archiving, particularly for extremely large images. 33% smaller than PNG is a measurably savings in image archiving.
[0] https://en.wikipedia.org/wiki/Huffyuv [1] https://en.wikipedia.org/wiki/Lossless_JPEG [2] https://en.wikipedia.org/wiki/FFV1
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EDIT:
I forgot to mention, there are plenty of non-archival formats that get traction even with incomplete browser support. The MKV container format is only partially supported in browsers (with WebM), but it's still a popular format for any kind of home video.