Big problem for NASA: once they discontinued manned space flight, they now have a very hard time getting back into it. The Russians spacecraft is considered relatively safe because they are building upon a proven technology that has been "debugged" for decades now. NASA just has a prototype that hasn't proven anything yet, and I doubt it will be ready by 2023.

The decision to go for a lander with wings and wheels looked so progressive then, and looks so misguided from today's point of view. NASA could build upon decades of expertise with Apollo-like spacecrafts today in order to build their Orion. Having switched to a shuttle, now they have to begin from scratch.