And two distinct advantages offset those: superior barrier penetration to either the 9mm or .45, especially auto glass, and being able to fit in a 9mm-sized frame so it can fit shooters who can't handle the girth of a .45
Few would base their decision on what handgun to buy on whether it would shoot trough a car window screen. How often do you think you would need to shoot trough a car window screen probably never. One incident here that i can remember a police officer had to shoot trough a car window screen killing the person in the car. He was using a 9mm. As for .40 people are starting to realise that it doesn't have much advantage over 9mm and is not worth the extra expense recoil and lower mag cap.