@baldur @rysiek
I get excellent results from using GIMP, Digikam and RawTherapee together. But, as a keen amateur, I don't need commands for bulk editing or high productivity like a pro might need, even though my hobby process is very efficient thanks to #Digikam at the centre. Which is very a powerful DAM, and often overlooked.

Also, be prepared to see GIMP gaining traction as it introduces important new features due soon. Non destructive working is not far off.