Only problem I have with the DPI no AFD is probably once a year I still get asked "Why wasn't that a first down?" It happened last Thursday in a JV game. We had 4th and goal at the B3 and DPI so me and the U walk off a yard and a half in and I keep the box on 4. The next play was unsuccessful and we change the ball over on downs. My sideline HC walks over after I've set the chains the other way and asks why that wasn't a first down.
I replied that it hasn't been for a few years now. I so wanted to add "and I don't think you are old enough to know when it was" but I held my tongue.