Depends on your definition of mass production. According to the article, CNC machines for stones are still a very much niche application. At least compared to t

Depends on your definition of mass production. According to the article, CNC machines for stones are still a very much niche application. At least compared to those for metals. Also, most large-scale construction nowadays is made from reinforced concrete, for requirements (including price and speed) that are hard to beat that with stone construction, even with assist by CNC machines. I certainly wouldn't mind a comeback of stone masonry in modern architecture though, both from an aesthetic point of view, and considering that stone buildings are usually made to last the ages.