It’s getting better, and this trend has seriously accelerated in the last months – my anecdotal observations.

libvips has now good support for jxl, it has (since 8.16) support for EXIF data in jxl files as well. All FOSS projects can now use this to kickstart their jxl support.

In the corporate world, well, we’re all waiting for Google (Chrome) and microsoft (Windows) basically. I think the rest is on board, Apple, Adobe, etc.

The support is shit only because of Google, Microsoft and Mozilla who refuse to add it to their OS / browser for their own selfish reasons. The tactic seems to be to just deliberately delay implementation to ensure JPEG-XL does not become popular. Now that Apple has adopted and deployed it on their OS platforms, hopefully others will feel the pressure to adopt it as JPEG-XL's user-base increases.