Americans prefer driving, usually. Family of four, single cost for all, and you don't need to rent a car on the other end. I thought BL stood a chance of making it, and maybe they do, you expect to lose a lot of money early on. But as noted, a family has to drive to the station, buy tix for 4, take the ride, rent a car on the other end, and drive to the hotel.
Or they can just drive, and endure bad traffic, or get up at 6 AM and beat it.
As noted, it's private monies, unlike that albatross out west (CA HSR).
I see various ethereal proposals for train from here to Charlotte or Savannah, it's the same deal, with less traffic.