Having enjoyed many trips on the former German overnight trains, "City Night Line", it is good to see some revival of the Night Train concept.
The way most folks travel in America by rail is very different to the European style, as is the Indian style, etc, etc.
I have always been happy to share a couchette compartment with other folk at a cheaper fare overnight, than have to pay a lot more for a solo sleeper room.
At the end of the day, it's a brand new design, something we don't anticipate anytime soon on any Amtrak routes...