K. Austin Collins’s review published on Letterboxd:
Who are the characters in Dunkirk, really? With 6,000 extras standing in for more than 300,000 men, all of them hanging around, there are plenty of moments in which we see men chatting away in the background of the action, offering up any number of ideas, observations, or mere stray thoughts. We’re never given access to any of that, however. Nolan is telling a survival story about characters who largely aren’t specific enough to have lives to go back to. It’s enough for the movie, it seems, that they’re alive and want to stay that way.
More here. Not a hater; not a fan.