Pre-panic-demic, I bought two single-stack Third-Generation S&W single-column-mag 9mm autos, a 3913 TSW, and a 908, locally, in used-very-little condition. I almost added another 908, but someone else finally bought it first. I reckoned that the pair-and-a-spare concept would have merit, as spare parts dwindle in availability, but I also sourced some pre-owned small parts through the evil bay.
These two pistols are mostly kept in reserve, for now. Compact 9mm pistols started really hurting my aging right thumb, hand, and wrist about three years ago, but I reckon that I am going to switch to left-side “primary,” anyway, sooner or later. I am functionally ambidextrous with most handguns, and chose to carry at 0300, in 1983/1984, but DA/SA is better done with my more-skilled left hand. (I write lefty, and throw righty.)
I had prior experience with a 3913 and a 3953, in the Nineties. I preferred the 3953, and sold the 3913 to a police colleague, for his wife to use as a duty pistol. A dear friend ended up with the 3953, during a 5-year period when I decided to concentrate on the 1911 as my only auto-pistol system.