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The Tesla Roadster flew, drove upside down, and hit 60mph in under a second
(www.theverge.com)
This is a most excellent place for technology news and articles.
The solar roof tiles were a real working product, they were just unprofitable even at very high price Tesla were selling them for. I briefly looked into them when I got solar panels installed at my previous home and it was about 50% more expensive thab replacing my roof and and getting traditional solar panels installed combined.
They never happened. Putting PV panels on the shady side of a roof was as brilliant as Hyperloop.
You think they didn't know how much they would cost to make?