I have been following the 'sky city' stuff for a while and it really does read like a fraud. The original attempt to build it wasn't some "missing paperwork" it was a pretty clear that the building would fall over if he built it, and some folks in the structural engineering community made that point to the government and BSB could not show how their assertions were incorrect. I've not seen the complaint but it was related to the wind loading and torque requirements on lower sections.

It will be interesting to watch this 'mini' tower and see how it holds up prior to trying something more dramatic.

But structural engineering aside, being able to rapidly assemble a building of significant capacity and a small foot print is a worth while capability to have. It doesn't lend itself to variety (and like an air craft carrier would probably require grid co-ordinates in the hallways to make navigation inside the building possible) but by shortening the time to erect, you eliminate a huge variability in cost which is the time on site/equipment use. Over half of the Bay bridge's cost overruns were associated with storage, inactive equipment and staff, and material cost bids expiring. So being able to do all of the erection in even a straight shot of two or three months would improve the economics tremendously.