Could the FBI save money by converting their handguns to 9mm?

[Mazryonh]

I've heard that the reason why the M9 handgun is being replaced by the US Armed Forces that used it previously is that the M9 frames are wearing out. But does the FBI use their handguns often enough to approach that level of wear?

The article also mentions that many FBI agents have no business being armed, or don't have the field experience (i.e., in on-the-street law enforcement with the possibility of running into violent situations) to use their handguns well without a lot of time they may not have spent training. I don't know how accurate that is.

There is also the possibility of a making a "trade-in and buy another model at a discount" deal with Glock. If the FBI traded in their .40 S&W Glocks for Glock 19s to fit with their caliber change they could save money and still keep the same manual of arms.