Do you really have a privately owned rail car in order to go fast? It sounds to me more like a self-driving campervan, you can sit back and watch the world roll by.
I think the railcar equivalent will eventually become reality (if it isn't already)
Lots of people tool around in giant class-a motorhomes. They are 40 or 45 feet long. They are basically small apartments with double-door fridges, dishwasher, washer/dryer, starlink, etc
if they add the self-driving stuff, it will make them extra popular.
It's definitely something a zillionaire does in a Peter F. Hamilton book, except instead of a rail car it's a zepplin. I mean, if I were a zillionaire I guess I'd live in a zepplin too.
