Not trying to split hairs or debate injection molding speeds. Cycle times depend on part size, material and a host of other factors. The point being, 3d printing can be competitive as a production process. Not all products require extra zeros as not all products need to be manufactured in the millions per day. For a tremendous number of products, a few hundred or a few thousand a day is sufficient. The bonus is, there are no molds to make and remake as they wear out. You don't have issues with parting lines and sprues. There is also no lead time for mold design and manufacture.

If printing 2,400 pieces a day is the number they can reach now in its infancy, we can speculate that those numbers will increase significantly in the next few years. I personally find this exciting news.