Many people prefer the old Ruger action without the transfer bar for various reasons. Some like the way the action feels when the hammer is cocked, others like the nostalgia. Some like the fact that you have to be more careful and in tune with the gun so as to handle it safely.
Before Ruger added the indexing pawl to the newest guns the chambers on the New Model guns wouldn't readily line up with the loading gate, which was annoying. Even with that, they don't load on half-cock hammer position which some traditionalists don't like. Also, the triggers on the New Model Rugers generally aren't as good.
The safety notches on hammers of Old Model Rugers and Colts and the sears on the triggers of those same guns simply aren't strong enough to be used for safe carry with six rounds (a strong blow will break them off and probably cause a discharge). Carrying the gun with the hammer down on a live round means that the firing pin is resting directly on the primer, a recipe for disaster if the hammer is bumped.
I can't say this enought, always carry these guns with 5 rounds and an empty chamber under the hammer.
This post was edited on 2/1 at 4:52 pm