Yeah. Like, anyone who has ever tried to get anything custom out of builders these days has been confronted with the fact that none of these guys want or care to do anything even close to custom work anymore. The diversity has been squeezed out of the market ages ago, cookie cutter houses are the norm everywhere. I only read the abstract, but it doesn't surprise me in the least that this paper just asserts conclusions without justification.

Houses are already as close to factory-built as is possible to do with today's tastes. Everything is pre-engineered and merely assembled on site.