Anyone who says the .40 is "dead" or "dying" is spouting nonsense. It seems to be #3 for full-sized autos. #3 is not dead or dying. The .40 is a "dying caliber" in the same way a .30-06 or .270 or .243 or .30-30 is a "dying caliber". It might be a "worse choice" for many than the 9mm, but it's far more practical than the .45 ACP. M&P9 = 17 rd. M&P40 = 15 rd. M&P45 = 10 rd. Hmmm.