Man, is there any aspect of Billy's playing you can not learn from?
Even though Buddy was a big influence when I was young I wasn't into jazz and big band. So, anything he did impressed me on a level as a soloist, and his abilities were beyond comprehension when I was a kid. Ginger baker became a huge influence when Cream hit. Then Carl Palmer, which was like a re-visitation of Buddy in a rock context. But when MO came along it was like jumping up in the air and landing on the moon. The sheer power. The speeds. The fills. The grooves. Total command and use of both hands around the set.
I may have written this on another thread, I forget, but I was thinking the other morning. I have seen, numerous times, when Billy is mentioned at the beginning of an interview or article, that he "shocked" the drumming world. Has ANY other drummer EVER done that? Besides what Buddy did in his day, even that, with all the splendid drummers in jazz/Big Band music before him and during his time, can it be said Buddy shocked the drumming world? Billy did. He shocked the drumming world. He hit drummers like putting your finger in a socket. It jolted you. You sat back. You shook your head. You sat up. You looked at the radio like it was messed up. "What the heck was that?"
Billy gets a lot of praise, but I do not believe his contribution to drum set artistry has really been acknowledged by drummers, in general. He literally changed the way most drummers approach a drum set. And in doing that, even kids who never heard of him were influenced by him because of his influence on others.
Just a giant. His contributions cannot be overestimated.