4800 "Rivets" is scheduled to go through the restoration shop after the "Lindberg" E6 #460 is completed.
In general I don't normally criticize how a professional museum of the quality of the Pennsylvania Railroad Museum makes their decisions. They are always in a tough position in determining how they tell a story about railroading history and work with less than adequate resources. As many will recall, the indoor collection has seen many changes of what has been inside and outside over the years. With the addition of the round house, much more of the collection will be indoors.
The collection should grow too once they get a hold of an F40PH and AEM7 to show the continuous history of railroading in Pennsylvania.