This topic has been discussed
ad nausem .
In short, some S&W owners say it's no big deal. Others(like me) think it's not a serious problem with non-magnum rounds but still would prefer
not to buy or carry a "lawyer lock" S&W revolver.
Smith & Wesson
does market a few revolvers with no security locks. Reportedly, they don't add more or drop the design feature due to legal issues/corp SOPs.
As many forum members & gun owners know; a few states & places set up new laws/statues saying
gun makers can't be sued or be subject to civil actions based on how the product(firearm) is used(or abused).
Smith & Wesson seems determined to keep this security lock design into the 2010s.