Well, I played in DS from version 2 through version 4.0 with the advent of the original Genesis, so "IF" (and it's a big IF) I were to go back to using DS with the latest version, I don't think I'd have too much trouble adjusting to it.
That said, I have absolutely no desire whatsoever to do so. I got back to using Poser with version 9 at the birth of Dawn, and since I was finally able to get my first Pro version with version 11, if this is going to be the last version of Poser, I'll stick with it until it literally stops working.
To my way of thinking, if it absolutely becomes necessary, and I'm still doing 3D artwork, I'll take the time to learn how to set up a whole scene for rendering in Blender. Up until now I've only done quick renders to check how my modeling projects are going, but Blender does do it all.
Anyway, I hope this doesn't really become an issue for a good number of years down the road.