Why stretch a Semi?

[Prop Shaft]

Thanks for the responses. Ive never driven a tractor truck. The extent of my truck experience was driving a 40' boom truck for a lumber yard in my younger days. It was the overhanging of loads in front of the trailer that I was overlooking. But I guess I was correct in assuming it was mostly a "coolness" thing. Do you guys who prefer long tractors find it harder or get annoyed trying to jockey trailers around? Or is it an acceptable trade off for over the road performance?