Amtrak with its dining car and special services, rules and atmosphere is unique and many people will miss it. But it is as well a very old fashioned way to travel that does not really fit nowadays to get from point A to B. It is so increadible slow since the railway are so old, the trains have to wait to let pass goods traffic... If the US given its vast size wants to profide an ecological alternative to cars and airplanes they would be the need to own the rails, make them fast, build a real network to get everywhere... So everything once has an end, as coal mining has.