why the hype about it?

While listing some of its unique advantages, it is important to address why 3D printing is of great importance. 3D printers have low start-up costs, to begin with. Regular manufacturing requires costume tools for every part of the object, and not necessarily tools are found together. By comparison, 3D printing needs no starting material except for the metal or plastic to be used and the final cost will depend on the size and time of the product. Another important advantage is that the object's geometric nature does not influence the object's manufacturing process. The whole notion of additive process is that no matter what the object's shape is, each part is added to top of the previous part. Using the system software, object size can be easily customized, so any size can be manufactured without impacting the cost or the process. This feature is not present in regular production where all costume tools are purchased together with the same size.
Text retrieved from: What is 3D printing? How does a 3D printer work? Learn 3D printing. (n.d.). Retrieved from https://3dprinting.com/what-is-3d-printing/#Examples-and-Applications-of-3D-Printing