Great article. This world is changing.
Half the jobs in America are involved in building houses. If they can perfect this technology, that’s a lot of nonexistent jobs.
First of all the material is concrete, not cement.
And concrete requires many hours to solidify and harden.
If the machine pushes out viscous material, it will change in
shape by gravity. All concrete pouring requires molds for this
very reason.
3-D printers are a joke. Good for making chocolate figurines and some small solid plastic shapes. For anything industrial strength components, the cost of building such machines will far outweigh conventional manufacturing.