I think almost the sae can be said for Hyperloop. There's no fundamentally new technology that needs to be engineered for it to work. Maglevs are common in many countries, evacuated tubs aren't complicated.
All that said, the US seems to be the wrong place to start Hyperloop. Regulation and land property will most likely be the biggest hurdle, not technology, especially in California. Hyperloop seems to me like a perfect project in China though, in regard to property rights, regulation, city planning, human capital in the high speed train sector, as well as crazy supply side economics.
