I used to work on Oddbods tv series as a Lookdev/Lighting Artist. Our lighting team has done 60 episodes (7min each) less than for a year. The transition from classical shading and lighting pipeline to PBR wasn't easy, many people didn't trust the "new" PBR technology, but I think it was worth and now everybody is happy about it. Shading and lighting processes became easier, we don't spend many hours trying to keep our lighting consistent. With PBR everything is simpler and more predictable. Thanks to Igor's implementation of Disney principled shader.
There are many things I'm not happy with because there were many unexpectable limitations, but it was an interesting experience for me and I'd like to keep this slice of my job here.