What do you think about houses made by 3D printers?

What do you think about houses made from a 3D printer

see from three months ago

ultimately it is a house cast from concrete, but the necessary grooves for piping and cables still have to be milled in afterwards.

No, they are recessed right away. I wouldn’t call such a buttercream concrete, even if it may be comparably strong once cured – but concrete includes gravel, which wouldn’t pass through a printer nozzle.

.... No, they are recessed right away.

well, yes and no:

the printer I had seen in operation had a clear nozzle width (flat nozzle), with which it could print a layer at full width. Estimated at about 2 cm/sec feed rate. Of course, you can't print recesses with that.

To print recesses, the clear nozzle width must of course be smaller than the finest structure resolution you want to print. For a resolution of, for example, 1 cm, you then have to run 15 passes for a wall thickness of 15 cm. That way you could realize simple recesses like socket holes or cable ducts. Naturally only at the resolution/accuracy of the strand thickness. With a fine nozzle, the printer would then of course be occupied for several weeks to print the walls.

Beams and ceilings cannot be realized that way, of course. After all, you can't build on air. That’s why openings for windows/doors have to be cut out afterward or everything assembled from smaller substructures.

At first glance, all this sounds attractive, but it does have quite a few additional efforts.