>>gumby+(OP)
There's a lot of discussion here of how this was predictable given the absence of a visible prototype for so long, and the over-the-top secrecy of the project. However, for me this was a predetermined failure when I first read an interview with the founder. Classic Super-Visionary snake-oil salesman. He could say nothing about the product, except for how it would change the world more than the world had ever been changed in the history of world changes. Sure, ok. I don't remember Larry and Sergey being like that (because they had a real product). Or Bezos, etc.
Frankly, I'm shocked at how the investors couldn't see past this CEO.