Having mulled over the movie for a bit, I think it might be one of the very few actual anti-war movies. Apocalypse Now, Saving Private Ryan or other non-American war movies usually glorify something about war - be it an action-sequence, a particularly fascinating character or the soundtrack.
I didn't see any of that in 1917.
Another aspect I enjoyed was the little bit of diversity shown with a couple of black soldiers and the Indian (?). Not that much but a little bit more accurate than Dunkirk et al.
Otherwise, I don't think the one-shot approach worked that well. There were some fantastic set pieces where it worked REALLY well, but overall it wasn't needed. Especially since there are time skips in the movie.
I didn't see any of that in 1917.
Blake and Scofield don't win a decisive battle, they don't show particular heroism or patriotism. And when Scofield reaches Mackenzie he can't stop the first wave. I also really enjoyed that MacKenzie wasn't some kind of captivating variety of Kurtz. Just someone who hoped there was a chance to end the stalemate.
Another aspect I enjoyed was the little bit of diversity shown with a couple of black soldiers and the Indian (?). Not that much but a little bit more accurate than Dunkirk et al.
Otherwise, I don't think the one-shot approach worked that well. There were some fantastic set pieces where it worked REALLY well, but overall it wasn't needed. Especially since there are time skips in the movie.