It's perfectly understandable from an audio perspective, what makes it hard to follow is continually jumping around in time frames.

After having seen it, there are some scenes where it is difficult to follow the dialog which I'm sure is intentional. I haven't seen Tenet but I think Oppenheimer is not as bad in this regard, in part because there's less exposition -- this is all based on real events in the real world and there aren't a lot of mechanics to have to explain, and also because the story isn't as plot-driven as many of Nolan's thrillers. No MacGuffins, no car chases, shootouts or real twists; it's more about the man, his relationships and how his career plays out. That said, for example there is a scene where he's talking to his wife outdoors, it's windy and they're not facing camera and the fact that I couldn't follow what they were saying did take me out... instead of being engaged in the conversation I was more aware I was sitting there watching Chris Nolan dialogue, waiting for it to be over.

i'm planning on getting a caption reciever thing - hopefully they aren't all rented out

shit, will there be a line?