Take that as you wish but i cant imagine a single style or outcome you can do with traditional rendering that cant be done in PBR especially not for performance reasons.
I'm comfortable taking your word for it at this point. You might have hit the nail on the head by saying traditional rendering. I am perhaps thinking of "non-traditional" rendering. I will experiment with PBR for my use-case further (when I tried it last time it seemed to slow down my scenes considerably, but it's not unlikely it was my own fault) and will pass judgment then.
Also, when that render is done using Blender Cycles without faking the effects it takes unrealistically long (which is my point), however, that's not important to this discussion. I didn't mean to derail this thread with this discussion. Sorry about that Lumak.
Edit: My point at the start was that the fake BRDF Lumak posted was cool and useful for me where PBR over-complicated my life and slowed down my renders, and the explanations of PBR dragonCASTjosh provided in response to my questions were useful and suggested I might have been doing something wrong. So perhaps it wasn't completely off-topic.