They're still manufactured according to prohibition-era design philosophies, the R&D just hasn't kept up. The only exceptions are a handful of subcompacts. The only way a full size revolver could be relevant is if you scaled up something like the Ruger LCRX, having the superfluous steel components replaced with polymer to save weight, and also gave it an integral optics rail and accessory rail. Without an optics rail the weapon loses relevance, but it has a fixed barrel so it's theoretically possible to mount superior optics and maintain a better sight picture under recoil. That potential is completely squandered if there's no optics rail, so it's almost like getting a great pistol that can't feed hollowpoints, it's basically useless. Revolvers have certain technical advantages over pistols that favor them for niche applications, but this is overshadowed by how primitive they are. This is a bigger issue to me than capacity or anything else. I'm not going to carry a GP100 or 686 when I could just carry a G17MOS with a Trijicon RMR and Streamlight light/laser module that weighs less fully loaded than the revolver does empty, but for certain situations and applications I definitely might carry an 8 shot .357 with a Vortex crossfire that weighs 34 ounces, that would be a hell of a woods gun at least. But there's basically no reason to buy any full size revolver on the market right now.