[JimiofEden]

Ummagumma is a pretty wild ride

I think their early stuff (Piper, Saucer) had a structure of sorts, but it was kinda out there and probably only Syd really understood it

Ummagumma was throwing stuff at the wall to see what stuck, and by Meddle they started actually developing a marketable formula (I'd say Atom Heart Mother is somewhere in the middle)

Then after Dark Side, they started their real structure and had piles of success until Waters was myopic enough to kick out the only person in the band that mattered