It is so stupid that JPEG XL and WebP both have lossless modes and yet, AFAICT, it is literally impossible to determine if a file is lossless without downloading a command line tool and digging through all the metadata it spews (like, even image editors don't seem to bother including that in their listed metadata). And it is impossible to configure (or even determine) which mode pretty much any encoder other than dedicated image editors and command line tools are using.
I can sorta get why they put them in the same format, so you can have mixed lossless and lossy channels within one image; but seems like they're actively making the most common usecase (fully lossy or fully lossless) much worse for everyone for the sake of a feature that'll be used by a handful of people at most (can't even think of a use-case really)
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