Despite all the moan & groan from all of us about the DF, DB pricing, upgrade policies etc. etc., I have to admit that C1 is pretty f'n awesome!
...and always made better by measurable improvements and features in every release. I am always amazed when I go back and edit RAW files from version 3.x or 4.x with 8.x.
Color control like never before - The Image Quality Professor's Blog
This is the intro article on the same feature: