TIFF/LAB output format support

Hello,
I would like to have a LAB D50 output and NOT an RGB file, this is to retain as much colors as possible.
Photoshop/Camera Raw and Affinity Photo are able to open / write TIFF files with the LAB pixel format and would be very useful to see this in LibRaw too.
What do you think?

Forums: 

LibRaw postprocessing is RGB

LibRaw postprocessing is RGB internally, so already limited by selected output color mode.

-- Alex Tutubalin @LibRaw LLC

Colour is not a physical

Colour is not a physical property.
"LAB pixel format" doesn't exist, too.

--
Iliah Borg