> You are probably too young to remember when Cisco
I am 42 years old. I remember when the SGI O2 was the hot thing to have on your desk, Netscape was the hot new startup, when Mozilla was open-sourced, and when jwz left to burn some of his fuck-you money on saving nightclub in San Francisco. All I could afford was my Linux PC, but I was alive. I remember the entire dotcom boom and bust.
None of that matters. I actually know some of the engineers that work (or have worked) at Elon Musk's companies. They're all extremely smart, talented and hard-working. (One of them hates Musk's guts, one is indifferent, and the rest of them respect him enormously.) Tesla will eventually be the largest company on Earth, and no one else is close.