Verrrry interesting...!
I'm not convinced that BIGGER is always better... And I think that over time, many of us have abandoned the reality of trying to travel with 'everything' from home, including the kitchen sink...
Maybe that rig would make life much easier in the Aussy outback or depths of the Sahara Desert, but I think he'll have a bit of a problem with a tight, jungle path or a rocky trail in some arid mountains...
What a great project to test one's skills at building the 'ultimate' 6x6 RV, Though - got to give him that...