At Woodstock, I think it was a Dave Marsh who put it best..."The Who were flat-out tripping against their will." Small wonder they all hated the set and festival, small wonder they were so angry, and small wonder it was the best set at all of Woodstock (Hendrix came close but his stage presence suffered due to drugs and a really heavy vibe around his management at the time).
The footage of Hendrix was after an hour of giving him drugs to attempt to negate some of the other drugs. He ended up canceling his scheduled appearance on Dick Cavett that night.
The Who and the Grateful Dead each demanded that they get a cashier’s check that weekend. The organizers had to fly a helicopter into town and get someone out of bed in the middle of the night to open a bank and draw the checks.
The Dead were free lovin’ but capitalists chasing that dollar.