The base of this edit is a standard AgX workflow with a Tri-x 400 LUT on top. Then I added my secret sauce.
(That being said, you can obviously approximate or replicate it in half a dozen different ways in darktable, I don’t claim to be that unique. I’m using some private LUTs in addition to the Tri-X)
It seems a nice look. Less than reminding me of Tri-X it reminds me of the use of a red contrast filter to capture the sky on a BW panchromatic film. Probably the look you were chasing.
Ah, okay. I already did last time, from the by all measures stupid 100% quality to 95, which cut the size in like a third. Might dial it back 5 more percent.
I am happy to be corrected if I am wrong but in previous experiments done by me years ago 100% quality JPG seems a waste of time as file size is bigger but no obvious improvement to image quality when zoomed right in. So I accept the programs default JPG compression which is usually around 90-95 %.
For this forum I usually restrict my export size to 2000px to avoid excessive file sizes. Others might have better options they can recommend.