> California hadn't been able to build a train a fraction of that distance without delays and squandering[??] massive amounts of money.
It costs money and time to build HSR. Fine. The J(N)R director who ran the shinkansen project literally lied to multiple levels of government to shield the (2x+) budget overruns. He resigned and then within a year of it opening he was given a medal for extraordinary contributions to Japan.
> Because nationwide high speed rail isn't as easy - or practical - as you think.
Who is claiming that it is easy? However, it is practical! It takes 6 hours to drive Tokyo to Osaka; it's 2hr by train. Trains leave every 5 minutes.
A west coast HSR network is just obviously practical! Beijing-Shanghai HSR is 1300km; SF to Seattle would be the same. It'd be 4-5h on a train. Right now it's 2.5 hours on a plane plus a recommended 1.5 hours for security and boarding plus transfers on each side--I'd rather take a high speed train If I could! SF to LA could be ~3h. 90 minutes on a plane plus lead time and transfer times and it's competitive. Again.
> There are US states similar in size to EU countries with comparable rail networks.
Oh, which ones?