The thing that puzzles me about huge expedition vehicles of all types is what are you suppose to do if it breaks, gets stuck, or flips on it's side in the middle of nowhere? Stuff can and does happen if you push limits.
With my buggy I only got it stuck once, and was able to push it while my future wife drove it. With a Jeep you get another Jeep to help. But with this huge thing, what's the likelihood that something big enough to tow you out will come along?
My guess is that much of the fun is in building it just because they can.
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