I'm a little disappointed at the framing. This is certainly not the first article to claim that the cerebellum is involved in reward: there was a series of PET

I'm a little disappointed at the framing. This is certainly not the first article to claim that the cerebellum is involved in reward: there was a series of PET studies c. 2000 that reported that the cerebellum encoded reward prediction error, and it's mentioned in the abstract of Wolfram Shultz's 2000 Annual Review, so it must have been fairly mainstream even back then. Alas, a growing chunk of neuroscience ignores everything that's not mouse optogenetics...