For me, it was when I tried to navigate the hallways in my house and wanted more than a handgun.
And if you want to keep a firearm in the car, that short barrel is nice, and I don't have to learn a new gun
I can understand the benefit in the car but how much benefit? Ya know, to register it and pay the tax. I’m not sure why you need more than a hand gun in your hallway? I’d be looking for less penetration, like a shot gun.