Do the new viewliner baggage cars still need a deadhead heritage car with them or not?
No.
Did they ever? Or was it yet another imaginary requirement in the minds of railfans?
Another imaginary requirement?
I seem to remember back when Amtrak first moved the Viewliner sleepers to the back of the Silver's consist, there was a problem with the Viewliners "tail wagging" back there. The solution was to then also move the (heritage) baggage car to behind the Viewliners to stop this.
So, I think this is very valid question. Since the a Viewliner sleeper had this "tail wagging" problem if it was the last car in the consist, do the new Viewliner baggage cars have the same problem? If so, would the same solution of having to put a heritage (baggage) car back there be still valid?
I mean, I could easily see that while Amtrak was running both a new Viewliner baggage car with an old heritage baggage car at the back of the consist, intended to be simply a backup, might have been masking this forgotten problem.