The simple reply to this is Adam.Fairclough is correct in saying "skill of artist is more important than the software itself", but it's undeniable that the R&D side of other programs like D5 and Twinmotion are greatly outpacing that of Enscape.
Enscape seems to be focused lately on making the UI look pretty and run well vs giving users more features to produce better renderings. Considering our clients never see the UI side of Enscape, that doesn't really seem to be a high priority to myself and others who have pointed that out. Speaking for myself, I would take a program with all my wishlisted features but terrible UI over a program with the opposite any day.
I am still on the Enscape train for now (mostly because Twinmotion still looks like a video game without post-processing, and D5 I feel still doesn't have the quality lead over Enscape), but all it could take for me to jump ship is a huge update from a competitor. Brand loyalty for software is almost non-existent, I am sure Enscape is aware of that, but as long as large firms purchase licenses and they still have a slight lead over the competition they are free to ride the wave as they please.