My EDC is a Sig P239 in 9mm since 1999. I chose it because I carried a P228 on duty, so they both work the same. I'm no longer "on duty," so I could carry something more up to date. The P239 is now out of production, and there are many options which are smaller, lighter, and have greater capacity, but none of the advantages are so overwhelming that I feel the need to change. The bad guys can carry whatever they want. They don't want to go up against me and my "old fashioned" pistol.
^ I align with this, too. I realized about a decade or so ago, as I started to bridge between beginner and intermediate-level training classes, that "almost the same" performance is by-definition not *exactly the same."
Until that time, I'd been using my 4.5-inch XDm9 in almost all of the handgun training classes I'd attended, but as that particular class resumed from our lunch break, I had decided to swap-out to my EDC - a 3.8 Compact in the same caliber - and I immediately noticed that I was behind the 8-ball. We shot several timed metrics, often under stress, and while I wasn't failing, I also wasn't scoring the same (at a glance, I honestly thought that I was out of the bell-curve).
So I went home and bought another 3.8 Compact for use as a training beater.
Upon reflection, I realized that not being an armed professional and with my lifestyle the way it was (and still is) my training time was very limited, so I had to find a way hike myself up on the power-curve as much as I could. Devoting myself to "just one gun" was the same in mind mind as going by that old wisdom of "practic[ing] one kick ten thousand times."
I very, very, very rarely carry anything but my XDm9 3.8 Compact, and I have a carbon copy (well, all except the cosmetics, so that I can tell the two apart at-a-glance
) of it which I use as my training/range beater.
As a result of the earnest practice of rounds-downrange and hours of dry-fire, I don't feel particularly "under-gunned" when I am using that 3.8 Compact. From contact to 50 yards, I'm very confident in the skills I've worked on. Instead, whenever I have the full-size gun in my hands, I feel as though I'd just been handed a cheat-code for the game.