NASA hasn't been neglecting the SLS either and has regularly been firing up its engines. That said, both rocket and capsule are far from done. The agency is still in the midst of putting the SLS' core stage (where the cryogenic liquid hydrogen and liquid oxygen are stored) together. Once it's finished, it will become the most powerful rocket ever built.

As for the capsule, well, the agency is still waiting on a key component that could push back the first Orion/SLS flight. The European Space Agency won't be able to deliver the capsule's primary propulsion component in January as planned and had to delay its shipment until April 2017 or later. NASA says it won't affect the project's timeline, though, and that the duo's flight is still a go for fall 2018.