alt Hacker NewsWorth pointing out that PNG is also just awful and should probably die like BMP died. WebP was already available at the time this article was written:
PNG: 1039993 bytes - baseline
optimized*: 541539
WebP: 398974 - lossless mode, of course.
JPEG XL: 310778 - lossless, quick, and easy.
*after monumental compute effort; still probably some room for improvement but the effort is ridiculous.
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With JPEG XL finally being allowed into mainstream web browsers, we’ll hopefully see more native platform support and be able to slowly phase every older codec out, since JPEG XL does very well at more or less everything (except for animation, compared to video codecs).
WebP is limited to 16383x16383. I've run into this limit a handful of times and I would expect it to become more of an issue as screen pixel densities increase.
For completeness, my background job of the highest imaginable PNG compression yielded optimized: 528313 bytes. Took only several minutes...
WebP stands on its own merits but it's profoundly annoying that as of Pop OS 22.04 I still have to open them up in Firefox instead of Eye of Gnome. Compatibility issues like this are littered everywhere. This laziness on the part of supporting WebP is a significant driver of continued use of PNG.