No none I was in Iraq with had red dot optic on their pistol. Including the high-speed ODA guys.
The high-speed guys may run red dots now, but I suspect they’re all the higher end RMRs and Aimpoints.
Red dots on rifles are different and were prolific.
I had the problem Rio refers to at a training with Thunder Ranch near Las Vegas. Using a Holosun on my 365XL, dirt and crap got on the ocular side of the site and it was near useless.
20,000 rounds or so with my M4 and a red dot, and I don’t recall that ever happening. In Iraq, in training, or in the dust bowl called Eastern Washington.