Oppenheimer, 7/10
To put it in a somewhat crass three-word summary: autistic nerd machismo.
With this and Tenet I feel Christopher Nolan is heading down the same path as Wes Anderson: content to just repeat and refine his style of filmmaking, regardless of the subject matter. And for me it's starting to hit diminishing returns. This isn't quite as chock full of Nolan-isms as Tenet, but some parts of it are Nolan on overdrive. So in case you were expecting this to be anything different, bad news for you.
I feel like I'm taking him for granted, so let's say that for all my personal gripes with Nolan's style, this is still top of the line filmmaking: the editing, music, acting, production design, effects and cinematography are all stellar. The ludicrously star-studded cast is firing on all cylinders. I'm pretty sure there are like 2 scenes in the entire film where Cillian Murphy isn't present, and he carries his role effortlessly. Special attention must be paid to the soundscape, because it's what basically makes this movie. Without it it would be just a whole load of white guys in suits talking for 3 hours. The central setpiece, the atomic test, is genuinely breathtaking and knuckle-whitening. On a technical level this movie is basically flawless. The first 1,5-2 hours are genuinely fantastic.
But like I said, Nolan's style is starting to hit diminishing returns for me, and here some of the choices feel perhaps more questionable than ever. As is expected at this point, the movie takes place in multiple time periods narratively: the experiments conducted during WW2, and Oppenheimer's public disgracing in the post-war years. But it doesn't stop there: these time periods are further split into different time periods internally, so the movie's playing out on like 4 time periods. Or maybe it was all linear and I just couldn't tell, because the movie jumps between scenes, locations and time periods at such a blistering pace that it was hard to keep up. Speaking of which, if you thought Interstellar and Tenet were hard to keep up with due to the wibbly wobbly time shenanigans, wait til you see Nolan get to make a scene of top-level theoretical physicists discussing hitherto unexplored concepts. It's like he's a kid let loose in a candy store without anything to hold him back.
This will be entirely down to personal taste, but for me the amount of discussion on technical detail just went overboard. A persistent criticism of Nolan's movies is how expository dialogue is often delivered robotically and mechanically. People don't stammer, they don't "umm" or even pause between lines of dialogue, it's always like:
Scientist 1: How can we solve this [really complicated science stuff]
Scientist 2 without missing a nanosecond: Have you considered [more complicated sciency stuff]?
Scientist 3 without missing a nanosecond: But didn't you heart about scientist 4 making this breakthrough in [yet more complicated sciency stuff]?
It would be fine if it was just limited to those scientific discussions, but every significant dialogue exchange is delivered in this exact same way, whether it's Oppenheimer wrestling with his crumbling reputation, or having a heart-to-heart with his mistress. This is why I use the word "autistic", because there's no better word to summarize the feeling I get from the combination of insane focus on technical detail, and lack of genuine-feeling human emotion I get from the characters. At times I wish there was a character who was hung over in one of these scenes, and would ask the other characters to speak a little slower for the benefit of the audience. During the last third of the movie I genuinely lost the plot a couple of times, and that's where it faltered the most for me.
The "nerd machismo" comes from how this movie feels like overall. This is a story about brilliant, but awkward and often morally dubious men coming together for a cause to prove themselves in the highest stages of scientific brilliance. It's almost like making the bomb is slaying some mythical monster, and the scientists are the 300 spartans. The often furious scientific debates might as well be muscle flexing competitions for how bullheaded and heated everone is in the scenes. The characters don't come into conflict over ethical quandries or how the experiment is affecting their life, it's because they often feel like their genius is being hampered by the other geniuses in the room. It's kind of funny.
So yeah, it's pure, distilled Nolan through and through. IMO for his next film he ought to switch it up a bit and direct a 95-minute romantic comedy. Or a kids' cartoon about a talking dog. Or just for maximum meme value, the sequel to Barbie.