Essentially the chance of something wrong happening on there return is high than like 1/270 or something, Scott Manley said 1/270 in a video so that’s where I’m getting that number, so they’re keeping them up there until they can either bring that chance down or get them another way home. If shit were to hit the fan in their orbit and they had to come home right now they could hop in Starliner and return but the risk for non emergencies is higher than NASA wants to accept right now.