Re: Electronificated dot sights on handguns...
Batteries are not forever. Who would go hunting without replacing the used battery in their red dot before they left? Or not double check the on-off switch to be sure the battery does not wear down in the gun case.
Cheapy red dots fail. Good ones like the UltraDot's don't. My favorite is the bottom of the line UltraDot one inch tube type with the single dot. It is not cheap. I have several, none of which has ever failed.
I use them for target shooting and plinking in the field (no can is safe around my red dotted guns!). I dial up the red dot so it flares to a size that just covers the black ring. If I keep the dot inside the ring the accuracy of the my shooting is increased remarkably over iron sights. Red dots are the go-to sights for Bullseye competition because they enhance the shooter's accuracy. They give the same increased sighting accuracy effect as a long barreled iron sighted gun with a very long sight radius. They are not to be shunned for target shooting. But we all have our preferences based on what works best for us. Old eyes love red dots.