I don't think you're giving it enough credit. Not only from the standpoint of its "one long shot" premise, but from the context of reality. The films you mention, especially, "Paths Of Glory", are all well done, but they don't begin to deal with the ugliness of war. It's like comparing "Sands of Iwo Jima" with the Russian film "Come and See " At its core, "1917" is an openly anti-war film. Because it gives you no breaks over its two unrelenting hours, it forces you to confront the palpable brutality of total war. It's an unpleasant film, but one that is trying to make a point and it does so with room to spare.