To those who think Glock has not been innovative enough and the changes they make are minor and slow in coming should remember who brought the polymer striker fired pistol to the point where it is now.
I have seen it in many industries. Manufactures that believe they have to come out with something new to keep their appeal with the public. It seems they change something only for the sake of changing something. A lot of times a point is reached where, when a manufacturer changes something, it is actually a step backwards and they make their product less reliable. I have seen it in cars, archery equipment, guns, and a host of other products. Why would Glock want to improve on something that is probably near perfect and cross a line with reliability. If they produced a model and then had to come out with a massive recall what would happen to their image. To me, if a pistol shoots straight, shoots fast, is reliable and fits good in my hand then their is no need to improve anything, just to come out with something different.
We all know of Remington, Winchester, and Colt. They have a long history of making good guns. But they have had their screw ups too. Why would Glock want to take the chance on moving back from the pinnacle of reliability, just to make a change they think necessary to keep the interest of the public. Their reliability is what keeps the interest in their pistols and they would do well to remember that.