This makes me think of the 'supergroup' col claypool's bucket of burning brains at Bonnaroo '09, iirc.
Buckethead, claypool & Bernie Worrell, I thought it was gonna be cool but it actually sucked bc it was one long guitar solo by buckethead that just was not interesting. Guy can do te fastest finger tapping arpeggios ever but that got boring after about 10 minutes. Dude literally did the same riff for an hour straight I thought it was awful. Then he goes through this whole stupid robot routine, puts on these weird gloves, goes back to the guitar & does the same riff he had been doing for an hour!
IMO it was some of the most boring jamming I've ever seen, who cares how difficult something is to play if it sounds like shit? How can you play the same riff for an hour, not surprising that band only played once. Guitar solos can be awesome, but they can get boring quick if they're not interesting
The Grateful Dead were arguably the first jam band, but they are not really a jam band, they're a songwriting band & their success was due to the quality of their songs, there's not many other bands that wrote on the level of the dead & people truly LOVE GD songs.