I don't think anyone has quite hit on the main reason yet: It has as much felt recoil as a .45 (which in my opinion isn't too much), and actually has MORE muzzle blast & muzzle flash than the .45. These were accusations that could also be leveled at the cartridge it aimed to duplicate, the .357 mag.
I regularly carry a .357mag mind you, but I shoot .38 +P ammo as full magnums WILL rob you of your night vision.
You'll probably never NEED a gun. I hope you never do. But IF you do, you will need it worse than anything you've ever needed in your life.
IF we're not supposed to eat animals,
howcome God made 'em outta meat?