From my understanding jpg is lossy with further editing. I also understand that under format options earlier in the export panel one has the option to choose 8 bit jpg and a number of others. Should these be set to yes for higher quality jpg results? Also there are a plethora of other selections under profile, intent and style. I also note that both upscaling and high quality resampling default to "no" when left alone. I am assuming that the additional file size and quality might show up in what-a really large monitor or in printing or? I was expecting with a file size roughly 10 times larger for the same image developed from ORF and the same processing- only changing the quality slider, that there might be some discernible "oh wow" difference but i just do not see it.
Bear in mind that I run a pair of BenQ 24" monitors, several years old, on the machine I do my editing on. In viewing them side by side I can not see any marked difference. Exporting to jpg at 90% quality might yield a 1.4 MB file where moving the slider to 100% yields a 14 MB file. In the export settings under jpg 8 bit the quality slider goes from 0 to 100. I shoot RAW- Oly ORF, import that to Darktable and make the changes I want in each photo.
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