Truly the end of an era with the phase-out of the long-serving 103系 and 201系 EMU's on this line. One thing that surprised me is why JR West didn't deploy the 321系 on the Osaka Loop Line at least five years ago. By the way, you can see the prototype 323系 EMU trainset parked at Morinomiya Depot at 32:43 to 33:00 in this video.