Krocus. You are so right about the towing capability of the 11/2 ton of today. I never had any doubt that I could pull a 3600 lb bass boat with a Toyota pickup, but I can sure tell you about stopping a Toyota pickup with a bass boat and all the equipment weighing near the 3600 pound mark. THE TRUCK JUST DOES NOT STOP.
When towing any load, at or near, the weight of the truck, the first thing one should ensure is that there are trailer brakes of some type, the second thing, they must be fully aware that the PUSHING momentum will change the stopping distance severely, and if the towed vehicle get off to either side it will have a tendency to flip the smaller truck.
That is speaking from experience, on April 8, 1988 on my way to the lake to pre fish for a tournament I had a vehicle pull out in front of me. To avoid hitting him broadside in the drivers door I moved to the left and tried to stop, as a result the truck rolled five times, and when it finally came to a stop the Skeeter 175 with a 200HP Merc, trolling motor, three batteries, 35 gallons of gasoline, and tandem axle trailer rammed the back of the truck. The two hitch came through the window and we would have likely been decapitated had the spring shackle not hung on the tail gate of the pickup stopping the trailer from going any further.
Point, you can pull almost anything with the lighter trucks, the problem is stopping them.