While I do own a couple of DAO LCP's, that's only because some of my jeans have front pockets that are too short and tight to conceal my J-frames. I spent my fair share of years having to constantly dress around my off-duty weapon choices as a younger man, and nowadays it's not as high on my daily list of things I wish to do.
I much prefer my J-frames for the heavier bullet weights I can use.
However, having been a longtime revolver shooter, my experience and choices may understandably be quite different from those of a lot of newer, younger folks. Or those folks who never really liked DA or DAO revolvers, in the first place. Different strokes, right?
When I (grudgingly) decided to own a .380 again - after about 25 years since owning the last one - I chose the LCP because it was just enough smaller than the S&W Bodyguard .380 to make a difference,
for me. If they had made a LCP of exactly the same dimensions chambered in 9mm, I'd have bought it. Yes, I briefly looked at the slightly larger Ruger plastic 9's first released back then, but the first couple of them that came through our range couldn't make it through a qual course-of-fire without problems. One of them continued to exhibit failures-to-fire even after coming back from a trip to Ruger for the problem. I've long since decided to leave checking for teething problems with new models to other folks.

Also, the slightly larger subcompact 9's are larger than the original generation of the LCP, by quite a bit.
I looked at the PM9 for a bit, but again, some of our folks experienced more issues with some than I cared to risk experiencing, and they're too large for some of the pockets in my jeans and slacks.
It's probably fair to opine that the very attributes that make the diminutive DA/DAO snubs so attractive for CCW in tight carry situations also tend to make them harder to shoot well for the average person, too. Compromises. It always seems to come down to compromises, and where someone wishes to draw their own line.
