I am someone that will confess to liking .40. I don't shoot it as much as 9mm normally, but I still keep and enjoy my .40 handguns and carry them plenty often, and I have a .357 sig barrel for some of them which is a nice option to have, especially with ammo issues these days. I could care less about .40sw being a little snappy in some guns I can shoot it within a couple hundredths of a second to my splits with 9mm, I don't think any bad guy is gonna notice or care. I don't think it's really dropped in popularity so much as people aren't seeking .40's over 9mm anymore, but there are millions of .40 guns out there so it's always gonna be around. In a state like this shit hole, where we are stuck with 10rd mags a larger caliber like 40sw or .45acp makes more sense because mag capacity is a moot point a lot of the time. I know "pre bans" but even carrying a pre ban your likely to get jammed up until you can prove they are legal mags, and the burden will be on you to prove it with the way the courts are in this state. From .380, 9mm, .40sw, to .45acp and 10mm I'm pretty indifferent I guess, I'm fine with all five, I don't feel under gunned with good modern .380 ammo, but I also know that .45acp and 10mm aren't some kind of small artillery on my hip, I have stuff in all the calibers, and sufficient ammo for each, and I just carry what I'm in the mood to carry based on what I'm wearing or where I'm gonna be going. Only time I'll carry one caliber or over the others is when I'm going to be in the woods, then I'm much more likely to be grabbing a 10mm or .45acp, or a revolver in .357 or .44 or something, but other than that I could care less, if I'm going to be going somewhere I think there is a higher chance of actually needing to use the pistol I'm carrying, I'll just carry an extra mag, maybe two if it's single stack, instead of the one spare I usually carry. I think most people that can actually shoot and are actually well practiced and train regularly with a handgun feel the same way. If I could only afford one caliber it would be different, I would pick one and stick with it, but I have a pretty good stable of handguns to choose from so the hardest decision for me is deciding which gun matches my outfit lol, so I guess I'll chalk that up to 1st world problems.