Graebert had complained to me that one of their problems is no competitors! This is different from being a monopoly. When you have no competitors, it can be hard for potential customers to see the point of your product. AutoCAD was successful only because CAD already existed.
Through a press release from Siemens PLM Software headlined "Analist GROUP implements d-cubed 2D DCM From siemens plm software with NEW portable aec APPLICATION", I learn about Analist Group of Italy:
Working with a version of 3DRoom for handheld computers that uses measurements from existing buildings surveyed by laser rangefinders, the 2D DCM supports the accurate computation of floor plans, the relations between room elements, and the connections between rooms.
Data can then be transferred from the handheld to the desktop version of 3DRoom, where the software interfaces with Analist’s ArchiPlan3D product, as well as other applications, to create architectural plans, 3D model renderings, bills of material, building elevations and sections.