I say that based on what I've seen and claims I've heard - optix, prman unloading and loading procedurals, a renderer making that claim a long time ago (maybe finalrender?) In any event I don't know if any work particularly well, for the same reasons that Hyperion succeeds of course.

I'm actually more surprised that you would think of sorting and batching of rays as a feat of engineering, I can't imagine it seems all that difficult to you after all your experience.