I had hoped the SD Series was not dead. The SD is much better than the SIGMA in so many ways.
The SD had melonite finish and a front night sight. It looks to me like all they did was take the SD and take away the melonite and the front night sight.
The price is right and the SD Series Trigger is better than SIGMA.
It will never be good enough for those who want a pistol at this price point to be as good as a Performance Center 1911 in terms of trigger or accuracy, so I anticipate that every kitchen table gunsmith that thought they knew more about gun design than S&W will get right to work removing parts, claiming those parts are not needed, doing kitchen table "trigger jobs" or sending the pistols back to S&W for a "free factory trigger job under warranty" claiming the trigger as designed is somehow not right.
The SD is advertised with 8 lbs + or - trigger, and it is designed to be like a DAO. If you want an M&P or Glock trigger, then by all means buy one of those. Personally, I liked the SD Series when it first came out, and I like these better, because I do not think the melonite finish or the front night sight is needed for the intended use.
I will not be at all heartbroken if the SIGMA is completely replaced by the SD Series. After owning and testing both, I find more to recommend in the SD than in the SIGMA.
Around 1990, if memory serves, S&W was about to hit the market with a couple thousand K frames in .357 Magnum at a fantastically low price, supposedly to be made up from left over forgings for the 9mm revolver M547 4 inch line. That was an excellent idea until someone figured out that something just wouldn't work. I wish I could remember the details, but I just cannot without trying to look it up. That .357 Magnum was to be fitted with the Combat Stock and would have been known as the Model 547M.
In any event, this is 22 years later, and this new VE version of the SD Series finally brings that idea to reality - a capable self-defense pistol at a really good price and with the S&W name.
I don't think anyone would argue that a 14 shot .40 S&W that takes up less space on your belt than a 6 shot K frame is a great idea.
Good ideas just keep coming from S&W.