I was thinking the same thing, albeit if someone is remodeling a residential house that has a main floor with a limited space, but the family would like a bigger kitchen, or a smaller living room? I'm wondering if it could be applicable in that scenario, or would be way more overkill than necessary? Taking into account of course of external walls, headers and other necessary limitations that might rule out using something like this?

I kind of feel like its overkill, but I'm curious what it would come up with if given a pretty strict boundaries in terms of space and dimensions even on a very large, multi-million dollar house. What's the threshold for when it could be applicable, versus "Yeah, we don't need something this insane to do this."

I do agree, it would be completely applicable in large sprawling buildings are being renovated, but are looking at how they can utilize existing space better.