At the beginning of the darktable manual (pdf p13) is the line:
"If you start your workflow from a raw image, you'll have to sharpen your final output."
What confused me a little. I should read it like:
- "The jpeg conversion of the camera includes a bit of sharpness, so you'll want to replicate that"
- "Humans like the sharpest images of what the camera does, so we all adapt by sharpening everything.
- "There is something in RAW that implicitly reduces the sharpness and that you need to compensate"
(There is a similar question, but one that focuses on a general definition of all digital files, and this interesting question is about the order of the steps)