It doesn't hold up today
I saw this movie for the first time today after missing it when it came out in '74, and I just don't see anything to it. It's a disjointed mess, and far too long to boot. Besides some beautiful scenery, the whole chase scene in the first half-hour of the movie was pointless. In general the car chase scenes were too numerous and pedestrian.
A lot of people here talk about the movie showing the pointlessness of society, turning convention upside down, etc. but while those elements may be there, it's almost like Eastwood and his buddies got together one weekend and decided to make a movie. Not much art to it.
I generally like Eastwood movies, especially from this time in his career. What am I missing? Maybe this movie was a pioneer of many of these themes, and since then many movies copied them with a lot more style?