So...I’m gonna pontificate, here.
I don’t worry about hangfires. If I’m shooting, and I get a click instead if a bang, I’m gonna do an immediate action drill (TRB if it's an auto, hit the trigger again if it's a revolver, work that bolt...etc).
Because the only round I’ve ever had hangfire was a pre-WW2 .303 round...in ammo produced since Nixon was President? Not a one.
The reason I won't worry about it is simple:
You fight as you train.
If you've trained yourself to stop and keep that weapon pointed downrange for X seconds before you do something about it? You will do the exact same thing in a fight for your life. You won't think about it, you won’t have time...you will fall back on your practice. Don’t think this is true? See the example of the cops who would always eject the brass from their revolvers into their hands, and then pocket it at the range while training, so they didn’t have to police it up...when in an actual gunfight, they died with spent brass in their pockets. They didn’t think about it, they just fell back on training.
Just my thoughts on it.