All new boards will have the new feature. The upgrade for the 680's will have the new boards. To unbox all old or pending grill stock and swap the boards would not be feasible, understandably. All of the packaging (a lot of it) would have to be redone, plus the labor involved. Much more cost effective to just ship the new boards to those who want them. It's just two screws and a couple of wire connections for the end user to deal with. My old board was fine, I just like to be precise without having to try and remember the offsets for two different probes.