Supergroups never work. The Best included John Entwistle, Keith Emerson, Joe Walsh, Jeff “Skunk” Baxter, and others. How could they fail? Because there’s only so much air in the room, and when you get giants like these together, there isn’t enough air to go around.
In classical music the concerto is a piece of music designed to show off the talent of the lead instrumentalist. The orchestra backs up the soloist. That was Keith Emerson’s approach to performance. Even within Emerson, Lake & Palmer, it was understood that the show was about Keith. Lake & Palmer were his orchestra.
I like this clip for several reasons. One is that I like the song. Another is that Jeff Baxter gets so excited about playing that he gets out of his chair. The third is that it shows Emerson’s attitude. He’s accustomed to being the soloist. Instead, this song relegates him to the orchestra. Notice his posture. The bored “this is too easy” stance of crossing his leg while he plays.
As good as they were individually, there’s no way a group like that could ever stay together.