There have been a number of developments in the 3DCP world lately, some good, some, well, not so good.
alquist
Alquist Demonstrates Practical Gains in 3D Construction Printing with Accelerated Build Timeline
It may be that 3DCP is beginning to move towards its potential.
About Habitat For Humanity’s First Partially 3D Printed Home
Habitat for Humanity announced a project in Virginia has used construction 3D printing as part of the home building process.