The Woodstock of Racing.
I think this is what McQueen wanted. A documentary of an experience rather than a straight doc with a lot of facts or a soapy drama a la Grand Prix. 1969 was a very experimental time. Many of those experiments didn't work, in their time, but with hindsight they become interesting glimpses into reality, so lacking in films from pre 1967-1970. It almost like McQueen isn't acting (except when he is acting) and we're just hanging out with him and all the others. All those cool looking people, clothes, cars, cameras, ect. remind me of the Monterey Pop Festival (1967) and Gimme Shelter (1970) where you know everything is real and you wonder "What ever became of this girl or that guy."
It is certainly of it's time, but with Steve McQueen, instead of Jimi Hendrix, asking the question "Are you experienced?".
"What rotten sins I've got working for me. I suppose it's the wages." -Bedazzled (1967)