There was never anything strictly wrong with .40 S&W, it works, but a popular opinion has been that its balance of qualities were never that great of a proposition. It's an opinion I've largely agreed with.
It fits right between 9mm Luger and .45 Auto, and this was a gap which wasn't in a dire need of being filled. A bit more powerful than 9mm, but with lower capacity and appreciably more recoil, but also not as powerful as .45 anyway.
10mm Auto always made more sense to me because you were looking at something that'd typically be more powerful than both (or at least AS powerful as .45), but slimmer so that you could stack more rounds than .45, thus making the tradeoffs more worthwhile and appealing.
>>64364414
She's small and cute, yeah, but her content still isn't very interesting to me.
I assume that .40 S&W is an appealing fit for her because it's a more powerful cartridge which she feels she can handle, given her light body weight.
I understand it too, you just gotta roll with the body that you have (or can build, if you're a man), but the world has largely gotten over .40, so she's not preaching to a very big choir.
Maybe if Asian countries started allowing for more private gun ownership, .40 S&W could get a second wind in the eastern world, it might be a similarly appealing proposition to the smaller statured people over there, but I imagine they wouldn't be disappointed with 9mm Luger either.
>>64364737
How much do you think she weighs? The recoil of 10mm Auto and .357 Magnum probably just IS too much for her for practical use.
Unless you mean OP, in which case he should Git Gud.