The US has the largest rail network in the world [1]. Its used for freight, not passengers, which is a more sensible use since rail can more large amounts of heavy stuff cheaply. Moving a few passengers at high speed is extremely expensive, and better done by aircraft or autonomous cars.

https://en.wikipedia.org/wiki/List_of_countries_by_rail_tran...

Tesla is doing the best for planet Earth of any company on the planet. Without them we would not be seeing traditional autos move away from fossil fuel vehicles - the margins and established knowledge would have been too good to just abandon it.