A cell phone is not going to tell you about that accident 3 miles ahead on the interstate and alert you to take an alternative route or sit in traffic for a couple of hours. I find the CB still very useful. Maybe that is because I actually use it and not just leave it turned off. Trucker jargon is not nearly as bad as it once was and usually just conversation with the occasional "bad mouth" that most of the other truckers seem to ignore as well nowadays.