The Tesla Roadster isn't an electric car.
See what I did there?
If theres one about Elon Musk is that believes not only that he can fail, but that that failure is the most likely outcome. He has said this in interviews before.
I've set to see a single one in the flesh. The only ones I've seen in photographs are tourist gimmicks. Granted, I've never travelled to North America, but I do live in a developed western country.
Hyperloop was definitely overhyped and the specific targetting of California HSR -- a comparatively near-term project using existing, well-established technology that involves deep transit connections throughout the populated parts of the State to support the main HSR corridors was a nonsensical part of that hype.
That said, the technology is interesting, and at worst Musk investing in developing a prototype will be a learning opportunity. We need more people with Musk's resources investing in longer-range, novel technologies.