There’s no getting around the fact that 3D printing is a slow process. Even with extremely fast motion systems of modern machines like delta robots we’re still stuck waiting hours for even simple parts to come off the machine.
We’re also seeing increasingly large machines which have the ability to create huge objects that push the limits of what we are capable of printing. However printing these huge parts is incredibly slow and waiting for literally days to print these large objects is simply impractical in many cases.
Prints are also often delicate and lacking in inter-layer adhesion limiting their practical applications. If we want to be printing objects like shelving brackets, furniture, and parts for large RepRap printers then we need to be able to print much faster and much stronger than we can at present.