I have three situations I worry about. However, at 80-100K pounds rolling down the road I'm not exactly agile or a speed demon.
The first, a random shooter firing into my cab. There has been a few random trucker shootings lately in the news. I have been a little more cognizant of people driving next to my door maintaining my speed, to the point I'll speed up or slow down. I would like to think I'm alert enough that if there was a driver next to me, and I saw the window start to roll down, I'd hammer on the brakes or perform some type of evasive manouvers.
Second is the classic box manouver. One vehicle in front, one beside me, they coordinate slowing down, forcing me to slow down with them. Again, speed is key for me to be manouverable, losing speed is not good.
Third, it's dark and I see blue and red lights in the rear view. Stop and pull over and surprise its not law enforcement. I have been told in that situation it is OK to keep driving and call 911 to ask if there is indeed a real traffic stop attempt in progress.
Even in posts on here I've read it's ok to call in to local LEO and be on the phone while they monitor the situation. Thats fine but I move around so much it would be hard to know the local LEO phone number at all times while scrambling to assess the situation.
Biggest thing I can come up with is speed equals mobility and manouverability