Funny gun shop discussion
I overheard a customer asking about 9mm handguns like a Glock. The store employee said that a 9mm will get you killed. You'll put two rounds in a crackhead and he will take the gun from you and beat you with it. Now, a 40 cal will knock down the crackhead and save your life.
I just shook my head and walked away. I have nothing against a 40 S&W JHP and in fact, I own several handguns in that caliber. But, a quality 9mm JHP will also get the job done too. Shot placement is key.