Single stack 9mm semis make a lot of sense for CCW. They carry and conceal well, are fast handling. I have a 3rd Gen S&W 3913 Ladysmith. I really like it and in the US forums it is greatly praised for CCW. It's been very reliable for me with 115 gr JHPs but I'm not sure about their durability performance.
https://i.imgur.com/OBQXSWYl.jpg
My 5906 went down with extraction issues. (I know what you're thinking, but it was solely factory-loaded new brass case ammunition - WWB, mostly.)
At the time, there were only two S&W warranty stations in all of Canada, and getting replacement parts was an issue too. S&W suggested that because my ten-year-old 5906 was, and I quote,
"obsolete", I should just switch to an M&P9. (As it happened, I already had an M&P9, but she didn't know that.) I found it unreasonable of S&W to fail to support the 5906 so quickly after it's manufacture and sale, and I told her so. Not long after that, a new (blued steel) extractor and several extractor springs appeared in the mail from S&W. I then mailed the pistol, and the new parts, all the way across the country so that the warranty station could install them.
All was well for about
2000 rounds (just factory-loaded new brass case ammunition), when the extraction issues started again. I took it out of service, switched to the M&P9, and eventually had a local gunsmith change the extractor spring (for one of the spares that S&W had sent me). By that time, I'd already switched to the M&P9, and I shot that M&P9 for part of one season until the striker broke, and there were no strikers to be had anywhere (no strikers from S&W, no strikers from the warranty stations, no strikers from Brownells) and I switched to my Glock G19 (which has been proven completly reliable).
Not long after that, an RCMP member acquaintance told me that
all members' pistols were returned to Depot for service EVERY YEAR. While at Depot, he said, among other thing, the pistols'
extractor springs were replaced, EVERY YEAR.
I laugh every time I see someone talking about how great the 3rd gen S&W pistols were. Here's a hint: if they were that great, they'd still be in production, and the RCMP in the sky wouldn't be carrying the G19.