Resting is essentially using residual heat to continue cooking pork butts. I've got an electric smoker. I never foil. I have never had any issues with tenderness or juiciness. I've started turning the smoker down to the lowest setting when it hits temp. I honestly can't tell a difference between resting and not. Can anyone give me a reason why resting would be any different than continuing to cook it at saying 160-175 for a couple hours? It seems like a lot of extra work for nothing to me.