I used to be friends with a cop who carried one. For awhile, it became a somewhat popular LE round, along with .40 S&W. Glock dropped the .357 from their commercial lines, but they still offer it for law enforcement purchases. With the improvements in bullets and ballistic performance in 9mm, a lot of agencies have gone back to 9mm to a large extent. I would think ammo/components might become harder to find, but the round won't become extinct anytime soon with .357 pistols still being built and sold.