United merely transferred those airplanes along with the old TSA birds that had previously transferred to XJT over to C5 because C5 is a LOT cheaper. And C5 is in the beginning stages of a huge ramp up to fly many, if not most of those airplanes. And Kirby's message was never that the 50 seat RJs were going away completely. He said "mostly" a thing of the past. When those statements were made, UAX carriers were flying almost 400 50 seat aircraft. What remains to be seen is what his definition of "mostly" is.