Asked about this at York, being that I'm looking at one of the RK MP-15's (Aug 2018) and Amtrak auto-train 6-car set (Sept. 2018). The answer I got was, the employee who maintained updates to the the shipping schedule had departed for greener pastures, and no one else was available to take up the position.
So, "when it gets here, it gets here" (and I make a mental note to maintain the play-money fund at an appropriate level for whenever they do)
---PCJ