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Re:JPEG XL and the Pareto Front by chungy on Friday March 01, 2024 @11:54PM (#39569943)
Wow, that really sucks. I appreciate the explanation as well as your frustration with it.

My desktop had a mixture of PNG and WebP files solely because of this limitation. I use the past tense because they've now all been converted to JPEG XL lossless.

Re:JPEG XL and the Pareto Front by JyrkiAlakuijala on Saturday March 02, 2024 @01:08AM (#39570275)
Another group of incompatibility with PNG was 16 bit coding. I had a plan to add it as simply sending two 8 bit images where the second image containing the 8 least significant bits would be predicted to be the same as the first. That way it would not be perfect, but it would be 100x better than how PNG deals with it. WebP had another plan for layers and tiles that never realized, and as a consequence WebP is stuck at 8 bits.