Until you get a faulty, contaminated or waterlogged primer. 99 times out of 100 a second hammer strike is all that's needed to touch it off, and that's a lot quicker with a DA than an SA trigger.
Personally, I'm quite fond of my CZ75B, which has a double action trigger, but was designed to be carried cocked and locked, just like a 1911.
As Browning and other experts then and now have noted, if you manage to get any of those conditions in military spec ammo, chances are that a restrike won’t fix the problem. Better to just discard the dud round and move on.
Note that most WW2 and later rifles have no restrike capability, either. And neither does a revolver unless you want to pull the trigger enough times to rotate the dud round into position again.
The CZ75B is a great pistol. 40S&W
Excellent.
Also, you are aware that CZ offers a single action only trigger option and swap-in retrofit for older weapons on the 75, right? It’s so the weapon could compete with single actions in shooting contests where DA is a distinct disadvantage.
I agree DA/SA is a solution to a nonexistent problem. There is very likely no one here who has sent as many .45 down the pipe as I have. I haven’t had a contaminated primer yet in my life, but the man who can fire the first shot DA, then the second one in .3 seconds SA accurately is a special 1 person indeed. I have shot about about 200 rounds a week through a .45 ACP since about 1974, winning lots of speed events, mostly with an Ed Brown modified Series 70. typically the second shot is going to go off before you’re ready, then you are so rattled the third is a waste as well. I can shoot a DA revolver, so would much rather have DA only, a Glock type action or SA only. You don’t need anything else on your mind in a fire fight. In that rare 1 in 50,000 rounds bad primer, the military won’t train you to pull the trigger again, and wonder whether it will fire, work the slide and get it out of there and take your chance on the next one. By the way, I have serious doubts if a primer is oil contaminated, that another strike is going to do a damn thing, except get you shot when it doesn’t go off. Clear your weapon and fire a fresh round.