Only by circumstance. I personally dropped M&P's for Glocks long before I was hired at a place that ended up doing the same.
My main range 17/old USPSA gun is only different from my work 17 in that it had adjustable Dawsons instead of the Chargers, and my work gun has less then 1k on it, while the range gun has 30k+.
If work went to some stupid gun, I wouldnt buy a spare.