That's a really good observation Wave. While you see a few souped up revolvers in competition shooting, you rarely, if ever see such a gun employed for self defense. I guess many people who choose revolvers do so for one or both of the following reasons; they believe in having a gun for self defense but don't worship them in detail as many of us do, or they simply like the simplicity and reliability that the revolver is known for. That may be part of the reason why you don't see any super high end revolvers. Or, maybe a gun such as the Smith and Wesson 686 or the Ruger GP100 is gun enough in the minds of most. These guns don't require the heavy customization to get them to run properly like some of the more complicated semi-auto's out of the box. I am sure there are a bunch of other reasons as well, but I suspect the 3 things I mentioned account for much of it.
-Charging Handle