[jeffbee]

Can you explain to the rest of us what about JPEG XL applies to that use case? If you asked me to store lossless, 16-bit (per channel, or monochrome, I am assuming) images I would suggest TIFF.

[lonjil]

I think they want better compression. JXL has excellent lossless compression.

[vetinari]

TIFF is a container, it can have payload with different compression schemes, lossy or lossless. Including JXL.

[account42]

TIFF can be used as a container. It also comes with its own (relatively shitty) compression methods which is probably what you'd end up using if you wanted 16-bit TIFFs today.

And TIFF as a container for JXL would no less require JXL adoption than plain JXL.