On Saturday, that led Buffett to retort, "Elon may turn things upside down in some areas. I don't think he'd want to take us on in candy." Buffett is the CEO of Berkshire Hathaway, which owns See's Candies. Basically, he was saying that there are companies with sustainable "moats" and that the tech industry wouldn't impact something like candy.
Which, as far as we can tell, led to Elon Musk tweeting all this.