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Being a well supported format on all OSs will allow that. One of the biggest failure of WebP was very poor native support beyond browsers. JXL is supported natively by pretty much all operating systems right now beside Android. JPEG recompression is simply an advantage

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I think the main issue with webp is it was pushed as purely a web delivery optimisation format and not a final output file you’d use in software. So it worked fine if you have a website automatically converting files for delivery, but no one was pushing for it to be supported in other programs.

JPEG XL is marketed as a high end format for photographers and already has support in most editing software.

There are many websites that would happily deliver webp images to the user and then refuse to accept webp images uploaded by the user (in forums for example). It just didn’t work for anything other than being displayed in a browser.

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