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Concrete-jet ‘printers’ to build houses, Moonbases in hours

My initial thoughts:

Positives

  • Very cool
  • Very quick
  • cheap
  • can build interesting things on a whim

Negatives

  • Removes a stage where intelligent, skilful, and experienced people examine and interpret the design
  • Looks like it will lead to buildings that are not easily modified/renovated.
  • No chance to recycle materials