Driving from Las Vegas to Jackson, WY I encountered a typical mix of wintry road conditions. It wasn't long before the nosecone iced over to the point where the forward sensors no longer functioned. So, of course AP and TACC were disabled and that's when I first realized that without TACC there is no legacy cruise control ( or should I call this TUCC -- Traffic Unaware Cruise Control? ). Once I pulled over to charge, it was easy to knock the ice off but that required me to manually control my speed until that time -- the horror! It would have been very nice to have TUCC until that time. I realize this could be a liability issue for Tesla. Even with warnings saying that legacy CC was functioning instead of TACC it would be easy for drivers to mentally lapse into TACC mode and we'd be reading about more accidents being "caused" by AP. Still, I for one would like to have TUCC activated when the sensors are disabled.