It's been a month or so since I read it but if I remember correctly beginning with SN15 it had major upgrades over the previous test articles. If it and SN16 preformed as planned they may skip over SN17-19 to SN20 which would have even more upgrades including being the first orbital model.
Is Boeing the current contract holder on this?
Yeah the SLS. I figured the testing in perpetuity was a blank check for someone. And that sounds like Boeing.Which part? The SLS has heavy Boeing involvement.
The Senator that is making this demand is from Washington which is home to Bezos and Boeing.
More appalling was the "we need to out innovate the Chinese!" comment. As if SpaceX isn't doing that handily by themselves.