Economics, political correctness and easier to train recoil sensitive people are the main reasons the 9mm is gaining in popularity with LEAs. Example the FBI went with the 9mm then promptly passed on the more powerful, proven and effective 125gr and 115gr rounds and chose the mouse fart least recoiling 147gr round for the girls behind the desks to train with. Then all the LEAs saw a way to rationalize going with the 9mm and save some money doing it. Next comes the fan boy herd all jacked up because the FBI and LEAs are moving more to the 9mm since the FBI wasted millions of dollars trying to justify such a lowly round. Next up the range owners, instructors, LGSs, ammo companies and Lucky Gunner all jump on the 9mm band wagon with $$$ signs in their eyes ready to cash in on their big seller. It's why Glock has recently made 10 different 9mm models without any other handgun caliber offered. All this started simply because the FBI admittedly stated that it went with the 9mm 147gr round simply because it "was the best round for THEM" and the fanboys only heard "the best" . The average civilian and the FBI having different "needs" seems irrelevant to the fanboys and the money makers. Funny actually, but then there's a 9 sucker born every minute.