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.