I never used a RDS equipped handgun on duty, even though I hung up my Glock 34 for a 43X MOS for the last 3+ years of my career as a neutered, office-bound administrator. I just never had the opportunity to go through handgun RDS transition training.
The biggest request I got over the past 3+ years I was in charge of training was for red dot transition school. Our older guys really were seeing the benefits of RDS on patrol rifles, and were hearing great things about the handgun RDS from the training staff. The younger guys all seem to be hip to the latest and greatest, so they, too wanted to transition to dots. (And $2,500 Staccato 2011’s… good luck getting the office to pay for those!) I must add that no one ever wanted lasers, even though I did write the policy to allow them.
Prior to retiring last month, I had two guys go through RDS instructor school and they were completing a curriculum to submit to POST for approval of a plainclothes RDS transition course. Hopefully it happens, as the demand is there and the training wasn’t cheap. (It should go through if someone in admin picks up the torch to drive it home.)
Other than the dot sights I have on rifles, I have two other RDS-milled handguns. Both are Glocks, a 17 and a 19, yet both are also sans a red dot sight.
Now the only handgun I own with an actual dot sight installed is one of my two 5.5” uppers for the Ruger Mk IV .22. ( Man it is nice taking 15 seconds to swap these out!)
I will say that for me the RDS is a bit funky to get used to, as I feel like I am pointing the gun downwards a bit when I am actually pointing straight. In close when I point shoot, I do not think I would be faster with a dot. In fact on a “draw-shoot” out to 7, maybe 10 yards or so, I would be slower trying to find the dot as I have trained for decades in this stuff. (I am not even using sights until I am out a ways.) But for shooting 15 yards and out, or for slow, deliberate fire; the dot is easier to shoot well with by far.
I will say don’t knock it until you’ve tried it. They take some getting used to but the red dot sights really do work well.
Stay safe.