Spot on. In the architectural and civil engineering fields, site models were constructed of cardboard, illustration board, and later foam layers tedious cut from topograhic map overlays and glued together like a layer cake. Result was a very heavy model. 3D printing means that the model can become a light weight shell as well as freeing professional staff from grunt work better utilized in other tasks.
Other modeling uses as well.
Old geezer professional welcomes slick new stuff.
Someday it will take just sand, energy and advanced 3D printing to create enormous building projects that cost virtually nothing.
The actual printing will be done by millions of tiny drones. some crawling, some flying, that can fuse sand together using a laser.
Buildings, homes, roads, bridges, dams...etc
Think of the construction abilities of some insects but with more intelligence and endless supplies of energy and an endless supply of worker drones.
No unions, no workers, no cost homes...it’s inevitable.
Everything is going to change.