This isn't the first "high-speed train" boondoggle in America -- rising up like a souffle and then collapsing in a heap.
About 115 years ago there was the story of "The Chicago-New York Air Line".
It was documented in Frank Rowsome's wonderful 1950's book "Trolley Car Treasury".
Also on wiki:
https://en.wikipedia.org/wiki/Chicago_%E2%80%93_New_York_Electric_Air_Line_RailroadThe big difference between "back then" and now is that in the early 1900's, this scheme was promoted by private interests. In California, it was "government interests" that pushed the project.
And just like "Coffee Creek" in the original Air Line story, the California HS Rail had a similar icon: miles of elevated structure, with nothing on it.
Amtrak has done a very modest job at upgrading the Northeast Corridor for a kind of "medium-high-speed" rail service with the Acelas. I never ran them in my time, but they were quite comfortable to ride on (as a "deadhead"). I did run the HHP-8 engines, which were basically double-ended versions of the Acela power units. They were quirky, but one could get used to them.