Until some rail road creates "non-stop" routes between major cities, you can forget it as something that a lot of people want to do.
I can remember 30 years ago, taking the Amtrack from D.C. to NYC. Seems like there were 20 or more stops along the way. Go 13 miles, come to a lurching stop. Get started again, go 16 miles, come to a lurching stop. And on and on and on.
On top of that, the cars were filthy and stunk.
Want to go D.C to NYC today? Get on a non-stop private bus that pulls up next to the curb in Alexandria, Virginia or downtown D.C., pay $40.00, and take off. Last I checked, one leaves about every 45 minutes.
And, whatever happened to the plan to have little Smart Cars available for rent at every train stop??
Never happened
Mannyrock