Yes, cars in America is something to stay but I feel a great example of rail at work is NJ, since I live in it and also NJ is to me developed rail transit and other forms of transit quite well. As in the case in New York, New Jersey transit system is a state wide agency. Not parts, also they are continuously expanding and improving their system. Like SNCF.
I think NJT does a very good job as well. But New Jersey is a small densely populated state, essentially part of 2 metropolitan regions. Mass transit is in demand, even then, the northwestern part of the state, where I live is not well served by it. Same in New York. Once you leave the NY Metro area and the MTA's domaon, how does the public transit fare? Passenger rail has a future in urban and in some areas inter urban venues, but I don't think a nation wide system like in other countries or as it was here in the past will ever happen.
Blame it all on Henry Ford.