I normally love these articles, but I simply cannot agree with the author's take on this one. I haven't worked in enforcement for a few years now, but it has been fewer years than I can count on one hand, and I've got experience with numerous styles of duty carry.
I'm an SA-35 owner and generally a Springfield fan. From my personal experience, the SA-35 is not reliable enough for duty or EDC use. Mine has gone down from one malfunction every 7 rounds to around one malfunction per every 50 rounds (after about 500 rounds and a trip back to Springfield). I love the way the gun shoots, and it is amazingly accurate. Unfortunately, it's reliability pales in comparison to guns like the Glock 43/48 series, the Sig P365 series, the S&W Shield/Shield Plus series, and the Hellcat series.
As far as ease-of-concealment, the SA-35 also falls significantly behind many other models. My department's undercover guys were issued S&W Shields (I assume that has or will change to the Shield Plus), but could carry anything they could qualify with. The Glock 43x seemed to be the most popular choice for officers carrying their own guns last time I checked. Literally all of the new "stack-and-a-half" micro-9's, even the larger "XL or Pro" models are smaller and thinner than the SA-35.
I know that Springfield advertises the SA-35 as not being a "Safe-Queen". Given my experience, the gun can only really serve as a safe queen or range toy. Luckily, the gun is an excellent range toy or safe queen. I just cannot in good conscious recommend it for EDC/CCW use.