My first thought is that it's not even a truck. The price will likely be increased and it will be unrepairable. You can't drive a car down the street without side mirrors.
The problem is the point of view. Towing a trailer of considerable length requires mirrors that stick particularly far out. If your vehicle doesn't have them front the factory then you can buy clip-ons that attach to your current mirror.
You're not just trying to see your blind spot, which becomes considerable with a trailer, but you're trying to be aware of what's behind you.
It'd be interesting if they went with additional cameras for this. For example, the rear-view mirror is a video feed already. It could stream from a camera you attach to the back of the trailer instead.
I don't have a lot of personal experience with trailers, a few thousand miles maybe. But I've never liked clip on side mirrors. They bounce around/vibrate. A camera system that's optically stabilized and patches into existing displays would feel a lot more natural for someone like me with minimal experience.
I heard that Tesla is bypassing that on the Roadster with removable side mirrors which you can install cameras there instead. Not sure on the specifics, but something along those lines (although I'm not sure about the legality and please don't quote me on this).
