>>211689470 (OP)I feel like people indeed never elaborate on why The Social Network works so well.
Fincher's calculated style is fucking perfect for the movie about of sociopathic nerds and this subject matter is also one of the few things for which Aaron Sorkin's usually insufferable writing actually works. You genuinely believe these fucks would talk like that.
Returning to style, there are a lot of peculiar details that enhance the movie, like the twins being played by the same actor doubled with CGI instead of just hiring a couple of twin actors. The special effects are never noticeable but it's still uncanny because you recognize the actor and you're not used to basically seeing double of him. I think it wasn't just done because Fincher wanted a famous actor, Fincher is known for being obsessed with using CGI with things you don't really need CGI, I believe he was trying to achieve the uncanny feeling from two Armie Hammers on screen deliberately, the film is often pretty creepy in tone, reflecting how sociopathic most of these characters are.