I could see where acceptance of the new technology could have some problems.
Our local plumbing jurisdiction took quite a while to allow plastic piping for underground sewer lines. That finally got approved long after it was in general use in other areas.
Concrete construction of various forms has been introduced into the building trades over the years. I expect that it won't be that much of problem to gain acceptance for the walls as shown in the videos.
Some other 3D printing building videos which I've seen do use the process for the roof as well. I suppose that could add some complexity, but concrete plank roof decks have been around for some time. The roof 3D printing may include some reinforcement?
https://www.youtube.com/watch?v=nH-zpnoNLEU
vic