I have autos in all my trucks from a Ranger to an F 750. Only after the F 750 everything is stick.
Never blown an auto tranny in any of my trucks. Easier to driver, easier to use in tight quarters, just one less thing to do while plowing. As it is you got to look in your mirrors, look in front of you, angle, raise, lower, ect the plow. Why add shifting and clutching to the list.