Are You ‘Extremely Hardcore’ or Not? How Elon Musk Is Dividing Silicon Valley’s Elite

Elon Musk has sometimes seemed like the person Silicon Valley would create if venture-funded engineers figured out how to build humans in a lab: the bold innovator fearlessly disrupting one industry after another with a nerdy verve.

And yet these days, Silicon Valley’s investors, leaders and commentators are profoundly divided about tech’s billionaire icon, in ways that are revealing about Mr. Musk and about the state of the industry.