Na, didn't need to be in outer space to enjoy some of their music.
Like you said they all seemed to pass through that stage in their music. They are all just pieces of that great puzzle of Rock Music.
I have most of the Grateful Deads music but reduced it down to two CD's I put together of my favorites.
Had many chances to attend their concerts but never did, just wasn't my scene.
Pink Floyd and Lead Zepplin are two more of my favorites along with Buffalo Springfield.