Why? Isn't Amtrak that, but just geographically-scoped? Isn't Caltrain workable? Subways also function fine in NYC, DC, Boston, and even LA
(to be clear, I don't think the other poster is correct that having trains would satisfy the desire of the guy who wants a self-driving Rivian. I consider his want/need there to be fundamentally different)
(to be clear, I don't think the other poster is correct that having trains would satisfy the desire of the guy who wants a self-driving Rivian. I consider his want/need there to be fundamentally different)