Unless the world's population goes back to crowding as close as possible in cities again, the hub and spoke model of transportation will not succeed. And there is no transportation method, besides maybe a Zeppelin or a cruise ship, that is more hub-and-spoke based than a railroad. I love trains and will continue to ride them-- for fun. The auto train to Florida is also very useful. The dedicated lines and heavily populated Northeast corridor are as good as it will ever get in the US in terms of financially sustainable operations. Almost every other Amtrak line is sustained by politics, not economics.