Indeed. It is very rare ( if not the only few I remember ) to see Silicon Valley or any VC funded Tech companies that is unsure of his / her tech or themselves. Their absolute optimistic nature ( If you could call it that ). People who are unsure of things, especially with leading edge tech, unproven tech and extreme difficulties tends to get my vote. I will now be keeping an eye on Cruise. Although I still think driverless cars in mainstream use is at least another 5 - 10 years away. There are just too many edge cases, but I hope people continue to work on it, as it will be part of the solution to solve housing and property market issues.