Yep, modern manufacturing, design and metallurgy improvements can help keep a 'dated' design alive and useful ...
Nostalgia plays a role, too ... no doubt. There's just
something about the SAA design revolver, regardless of who produces it, which can evoke pride of ownership ...
A modern quality example of the design, within the intended limits of its structural strength regarding the intended cartridge, can be a rather robust and durable handgun. Simplicity of design can be an advantage.
Briskly thumb-cocking the SA revolver's hammer can lend a bit of momentum to the cylinder that trigger cocking might not always duplicate, and can help make for very positive cylinder rotation.
The plow-share handle of the standard SAA design, as well as the Bisley target grip profile, permits a potentially less punishing type of felt recoil for many users/owners. The rotation of the grip within the shooter's grasp may be helpful not only in helping mitigate the perceived effects of recoil, but also with repeated thumb-cocking for follow-up shots, especially when using a 2-handed technique.
Different SA hammer & trigger configurations may be prefered by different owners for different reasons. Taller/lower hammers, for instance.
As far as shooting SA revolvers 'faster' than a semiauto pistol, I wasn't as clear as I might've been ...
What I meant to say was that my aging SA revolver skills, and the excellent (for me) balance and handling characteristics of the short-barreled SA revolver, still permitted me to engage and accurately hit targets faster than many of our 'average' pistol users were able to do with their issued 9mm pistols. From my perspective, that leads me to suspect that the many variations of an old saying may still have some relevence ... namely, that the skill of the user is sometimes of potentially greater importance than the exact tool itself, presuming at least an acceptable tool, when it comes to successfully completing a task.
Naturally, I can accurately shoot any of my semiauto pistols faster than I can shoot my SA revolvers ... and reload them faster, as well.
It's just that as long as I can thumb-cock a SA revolver, I feel comfortable relying on one for most outdoors protection and defensive situations I anticipate encountering. Also, the many years of practice I gained when it comes to 1-handed, hip/point shooting with my SA revolvers still apparently permits me to maintain a fist-sized group at 1-3 yards, shooting my SA as fast as I can bring the gun back down onto target, while thumb-cocking it and depressing the trigger.
SA revolvers can be an enjoyable handgun shooting experience, but they aren't for everybody ...
The trigger cocking & firing capabilities and advantages of a DA/DAO revolver aren't to be casually dismissed, though, and may well be a more viable option for most folks desiring to acquire the basic revolver skills used with the modern DA revolver design. I think that SA revolvers, as well as SA pistols (cocked & locked, ala 1911 & 1935 models), are best left to those folks who have the necessary skills to properly and safely utilize them, especially under potentially stressful conditions.
Lots of folks have unintentionally shot themselves while trying to perform 'fast draw' ...