2/3's of the way thru and still a good film. A bit preachy, and Part 4 was not as good as Part 3, but it's an interesting schism within the lead character. As he gets closer to real humanity- in its full ugliness, he gets farther away from his ideal of happiness, yet he's a better person.
The film is not great and some editing was needed, but quite ambitious, and the rare film deserving of the moniker epic.