My complaint is specifically related to the double joints in the front legs. Sure, spend enough time messing with it and one would get faster at setting it up. To be fair, my experience is only in setting it up on the table at SAR, as you see my display above. I did not ever take the beast to the range. Have other options for that, so I only drag it out once a year. I found that dual pivot leg to be counter productive and I would imagine it was slow even when well experienced on it, compared to the simpler legs of the 1917 or 1917A1. The uneven terrain advantage might be a good point, but in the fields of France I don't know how much that would have mattered. Only a very few 1917 guns actually saw service, in the last few months of the war, and what pics I have seen all show the 1917 pod. Now I don't know what his sources were, but Dolf Goldsmith wrote that the 1918 pod was unpopular when the 1917s were working just fine. I am taking him at his word on that, as he did the research. They made about as many of these as they did the 1917 pods, and all were probably done within a few months of war's end, just like the 1917 guns themselves. That leads me to think that cost was not a deciding factor between them. There seems no question the 1918s were removed from service except in training, though it is also fair to point out that these never had much opportunity for real combat testing before the A1 pod replaced it all in the mid 30s. Yet the 1917 lowers were the choice to settle on when the redesign was developed, which is why so many of those lowers survived, with the newer cradle adapted. The 1918s mostly got scrapped. Again, I think the 1918s are more common only because we sent thousands to the Brits, where a few were able to come back decades later. Otherwise, these would probably be as rare and valuable as an intact 1917 pod.
The M2 and 1917A1 pods both get adopted right around 1934. The 1917 pod is already simplified by deleting the worm gear traverse mechanism from the drawings in 1927. Seems many of those pods had those parts removed at some point, maybe around the same time. But drawing changes meant nothing, as the pods were all made years before that. In practice, that turned out an unsuccessful complication that someone added, to Browning's original design, that proved not to serve well. The Germans like to make everything complicated, and I can't say whether the complex mounts they used gave them any real advantage over what we issued. Not qualified to venture on that. But I tend to like simple, myself. I'm just a college drop out, after all!