Leon,
I don't know if you'd remember way back when we discussed the subtle differences between a 747 and a Canal Barge. And later we discussed trips across the Atlantic on Ships. I'm sure you'd agree that even the likes of the barges and the QE3 could not be considered mainstream as you seem to understand it.
I believe you are the first and only to mention 'airships' being mainstream.
Niche capability vehicles like the Land Rover, Jeep and Islander seem to make a good living in their non-mainstream long-endurance lives.
We, neither of us, know what the actual operating costs or performance figures are for this design, or even will be as development continues. The 'designed' factors have yet to be proven. We may be seeing something akin to the Harrier being developed - a strange and un-conventional machine that doesn't appear to have any particular purpose at its start....or not, as the case may eventually prove.
Your unqualified opinions on performance are at the very least annoying, and portray you with a closed mind to anything you don't like or understand.