I wear Peltor Sport Tacs for everything except hunting with moderated cartridge rifles. I just don't like the sense of disconnection from the environment I get with muffs or plugs, even electronic ones.
This doesn't bother me too much when decoying or shooting driven game, as the sport is primarily visual and the sound of flushing birds is picked up by the microphones.
When stalking, though, I want clean, natural, all-round sound. It may not give me an advantage, but not to have it detracts from the immersive nature of the sport. I could of course wear some round-the-neck plugs and pop them in just before taking the shot, if time permits. And may do so from now on.
In case that sounds too high-minded, I have to confess that when sitting out for foxes I'll often don the muffs, but mostly so I can plug my phone in and listen to whatever I've saved on the Radio iPlayer.