I'm too stuck in my old hippy ways. Thanks for the list. I have some listening to do! 

https://www.youtube.com/watch?v=3I7CLy70WtI

8:30 Jethro Tull
10:20 ELO
12:15 James Bond

allusions aren't derivative in a negative way

As you might have suspected, the Grateful Dead songs I've heard are folky knee slappers such as Uncle John's Band.  That is what I think of when I say not complex.  Like, fall asleep in the elevator not complex.  Your example is so complex it has allusions to way more than the 3 styles I mentioned, while not having a cohesive thread throughout, which is much like the conversations I've had at hippie festivals :D  So I stand corrected, I see the Dead can get complex.

try
Snarky Puppy
Elephant Revival
TAUK
King Canyon
FORQ
Lettuce
Explosions in the Sky




UCantDoThatDotRugged

Okay- not complex enough, but this one is too complex, derivative, and doesn't respect the melody? Jethro Tull? ELO? James Bond? Interesting take. I'm curious as to your tastes? Name a few bands you like? We may be from different planets, I suspect:)

siggy47

Music

What's the best concert you ever saw?  How about the last one you saw?

I mean, yea, I can appreciate the Jethro Tull and ELO(?) and James Bond soundtrack allusions ... but mostly it just sounds like trying not to ever have any identifiable rhythm for as long as possible.  Like many others in that list, complexity at the expense of melody.  That said I bet a live show would be amazing.