Well heck, if you are going to get engineering firms that can work with OE's to interface with all of that stuff ( I know, 'cause I work for one too
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I could see a benefit of powering a trailer to help haul stuff, this coudl lead to being able to downsize truck engines that haul things which could improve efficiency. If you can drop a truck engine form an 8 to small 6 and tow the same thing because you do not need that low end torque, image the fuel economy savings!