yes... I don't HAVE P11... and just said I've never seen anyone DO a firefly render OUT OF P11 .... never saw a "P11-Firefly render" posted.
ALL of my product imagery over the last several months that show Poser/non DS renders are either Superfly or Firefly (as marked) BUT all were rendered in P11 as it's a LOT faster than my P10. I LOVE that one can use the material room in so many different ways now, including still being able to use it the "old way". I am SO glad they kept Firefly in p11 too and as a content creator, I actually find the P11 material room MUCH easier to use than previous versions. I LOVE all the new material/shader options but I also love knowing I can experiment as I find time/ I don't have to crash-learn all the new possibilities P11 has right away. As an artist I will be continuing to use Poser myself for my own work (both FF sand SF as yes they can have "different" looks and one lends itself better than another for a given artwork) and plan to keep providing Poser materials as long it as it makes sense for me to do so, regardless what happens with Poser itself in the future.