Like I said, I use straps with the L3200. Four 7500lb rated straps holding a 4500lb tractor in place is fines and within the law, at least in my state. Probably way overkill in reality, but I have yet to loose anything on the road, and do not want to start now!
Of course like many other things in life, you have to use what works best and is applicable to what is being held in place. Straps work better and make more sense in certain applications, and chains are the only choice in other applications.
For that reason, I carry both and select the proper chain/strap for the load,
David