How many years did they have the coaches on the rails? Times have changed, and sure I don't like a lot of the changes, but this one is a no brainer. With all the business that railroads have today, they don't really care that much about the hassle of moving a show train like years ago, its a good thing that the railroads even still will pull the loads because they could do fine without RB&BB and Strates.
They don't want to fool with coaches, people riding on them that could be hurt or killed in an accident, or people coming and going on RR property. Strates held on to them for as long as he could, but with some bigger spots missing now, the economy, and changing attitudes with the railroads it just cost to much to fool with.
The way things change now a days, we better enjoy watching the flats while we can, cause one day with the changing needs of the business, railroad policy, and costs we might not even have that, and no I don't know any inside information, just my thoughts.
Personally thinking, wouldn't mind them cutting the coaches up for scrap iron if it meant they could bring classics like the Sky Wheel, Diver, Scram, and Pirate back out. But I know that is most likely not going to happen.