A few years ago I saw an interesting documentary about how much of Pink Floyd's material is really about their former lead singer. He left the band in order to continue his experiments with drugs. He was young, handsome, famous -- and threw it all away to waste his life with drugs. Yet another victim of the drug culture.
"He left the band in order to continue his experiments with drugs"
If by left to experiment with drugs you mean kicked out of band cause he was too crazy to play guitar and sing then you're right.
From what I've read, he was going insane anyway, LSD (his drug of choice) just sped up the process.
I was glad to read, the members of Pink Floyd made sure he was VERY well taken care of. There was an article a couple years back who got pictures of him riding his bike in the small town he lived in, he was living alone, painting, writing, and completely shunned the press and the fans. They said he was writing a history of art...
He was a strange, enigmatic man, who inspired and intrigued. RIP Syd, there will never be another.