The photos that Archer posts of the wear on the teeth of the co-axial escapement strongly suggests that it exhibits more wear in the long term as opposed to less when compared to the Swiss lever escapement.I agree that it’s the silicon hairspring that is mainly responsible for the accuracy/precision. But I also think the co-axial is a cool feature. Is it significantly better than the Swiss lever and it’s close derivatives, probably not. Will it result in less long term wear and tear? The jurys still out.
I find it a little hard to believe, that in an industry where any tiny improvement is shouted from the rooftops, that if the co-axial provided substantially better accuracy, Omega would not market it based on that. It makes no sense.
In terms of service intervals, I can tell you exactly how many watches I get in that are in need of service only because of the lever escapement - zero. We all know that watches can and do run longer than the recommended service interval, so does changing one part of a large system really make the service interval longer? Think about it...
I always find it interesting the claim of no real friction in a co-axial escapement. If there's no friction between the co-axial wheel and the pallet fork, neither should wear, right? Well, they do:
Here's another one:
I see worn co-axial wheels often. I rarely see worn teeth on escape wheels in a Swiss lever escapement watch (the kind that have all that friction). No sliding fiction - watch this video that I took with a Cal. 2500 under a microscope to show the action in one part of the escapement cycle:
I think you will find that if anything, Daniels wanted a slower beat rate, not a faster one, because he knew that faster beat rates would cause more damage to the escapement. People on watch forums spend far too much time connecting accuracy to beat rate. While they are certainly connected in ways, beat rate is not the be all, end all in watch accuracy, as there are a multitude of factors and design considerations that affect accuracy. Every design decision made in a watch is compromise of one kind or another.