My time in the .mil has convinced me the M9 never had a reasonable chance in mass issued service. My current deployment to AFG is only further convincing me. When I initially inspected my own issued M9, I was pleasantly surprised to see it hadn't been fired much. But of course, the ban era mags are on original springs/followers and had likely never been cleaned.
I see people walking around base with M9s caked in dust. I've seen multiple pistols with grips retained by duct tape. And I've heard a concerning number of people laugh about never having cleaned their pistol in six months. I can't imagine how many of those guns have been allowed to go on with pitted locking blocks or worn recoil springs.
Will a new fleet of striker-fired, polymer guns fix this problem? Maybe, but the skeptic in me thinks we'll come full circle after the next generation of service members inevitably abuses and neglects the pistols they're given.