This does make much more sense. The Steinberg video I watched was not “advanced” and my overall feeling was that Track Versions was the new way to do comping. In that video there was no mention of the Audio Part Editor so naturally I thought Steinberg might be phasing that out. 
So for multiple tacks, Track Versions seems to be the ticket.
Single tracks, such as a vocalist, using the Audio Part Editor with lanes.
For a while, I too didn’t do comping in the Audio Part Editor because Steinberg screwed it up in a prior version, but later corrected their ways.