I’m working on a piece along these lines for PM or PJM, but Jim Oberg beat me to the punch:
The plan to reshape the Orion spaceship as a standby rescue vehicle for station crews has profound implications for the requirements of the commercial taxi and its cost. This strategy means the taxis won’t have to last for six months “parked” in space, like Russia’s Soyuz spaceships. The simplification of the taxi’s mission will allow its hardware to be significantly less expensive to build and to validate.
The crucial systems for the taxis have mostly already been built and are available as off-the-shelf technology — which means the spaceships could be much cheaper, much smaller and much more reliable.
The FUD being spread by defenders of the status quo has been almost palpable, and it’s all unjustified.
[Update a few minutes later]
I should add that I doubt very much if the commercial contractors are going to use the Orion abort system. It’s overkill, in both weight and cost. In fact, for a much lighter vehicle, as a taxi would be, it would probably kill the occupants from the acceleration.