Another thing that I'd like to add preemptively before someone inevitably enters the thread to spew worthless misinformation...
No, .40 S&W does not "tear guns apart" nor does it wear a firearm out any faster than 9mm Luger +P loads. Perhaps there was some truth to it back in the earliest days of the cartridge when manufactures were basically just reeming out 9mm barrels/chambers to accommodate the larger .40 S&W cartridge, but manufacturers have long since stopped doing that in favor of building firearms specifically for .40 S&W, which may appear to be exactly the same as their 9mm counterparts to the naked eye, but if you actually put some calipers on them you'll find that the slides are slightly thicker around.
Also, ignore folks who prattle on about how .40 S&W is an extremely high pressure cartridge. These people have absolutely no idea what they're talking about because in reality the .40 S&W cartridge operates at identical chamber pressures to standard pressure 9mm Luger ammo, they both operate at 35,000psi, and 9mm +P is actually significantly higher in pressure, landing at 38,500psi. This is because .40 S&W is larger in diameter, ergo the cartridge generates less pressure in spite of being more powerful than 9mm Luger +P ammo.
Furthermore, .40 S&W isn't and most likely never will be dead, no matter how many people may assert it to be so in hopes that if they keep on saying it then eventually it will become true.
Heck, even if it was, we live in a world in which you can still buy ammo for cartridges which have long since faded into obscurity like .25 ACP, .38 S&W, (not to be confused with .38 Special) 7.65x25 Tokarev, 9x18 Ultra/Police, etc. So even if everyone including Smith & Wesson were to cease producing firearms in .40 S&W, then ammo manufactures would continue producing the ammo decades upon decades later. Seriously, if there are still companies making old cartridges like .44-40 and obscure cartridges which never achieved mainstream popularity which very few firearms were ever chambered in like 9x18 Ultra/Police, then I'm pretty sure .40 S&W ammo will still be in production long after we're all dead. Besides, most .40s can be easily converted to 9mm Luger.
It's downright baffling just how much information is spread around about the .40 S&W cartridge, but then again, when people are absolutely determined to hate something, they generally don't bother to actually come up with tangible reasons for their hate and thus opt to merely parrot what other ignorant haters have to say about it without bothering to verify the validity of such statements because blind hatred is dumb.
Last but not least, I would like to take this opportunity to state that I am not a .40 S&W fanboy. In fact, I don't even own any firearms chambered in .40 S&W yet. I've been carrying a .380 for years, and only recently decided to start carrying something more, which was going to be a Ruger EC9s because I liked my brother's LC9s, but I ultimately ended up finding a S&W Sigma SW40VE for $199 LNiB at my LGS, so I put it on layaway and plan on using it for Winter carry.
So yeah, by no means is .40 S&W a "must have" cartridge, but then again, neither is 9mm, really. I'm merely pointing out that the vast majority of the negatives associated with the .40 S&W cartridge are gross exaggeration at best, and that at the bottom dollar prices that .40cal pistols are going for these days, you'd have to be a complete fool not to buy one if a good deal crosses your path, because even if you find the felt recoil completely intolerable, you can easily and cheaply convert them to other calibers like 9mm Luger, and once another ammo shortage inevitably hits and you can't find 9mm anywhere, you have another option which may very well still be able to find. It never hurts to have another cartridge on reserve.