Yeah, the U.S. has something like 140,000 miles of railroads, 14x that of of a country like the UK, but because the U.S. is so massive, it is just inconvenient for most travelers, so it gets used mostly for freight shipping. (Also most of it is not high speed rails, so for many, it doesn't make the trip for efficient time and or price wise, knowing they will likely still need to rent a car when they get to their destination)