Elon Musk says to expect "major" Tesla hardware revisions almost annually

Tesla CEO and founder Elon Musk has advice for prospective buyers hoping their vehicles will be future-proof: Shop elsewhere. Musk made the comment when responding to a Twitter question about the possibility of a paid upgrade path for existing vehicle owners who want the new sensors, computer and other components now shipping in so-called ‘HW2’-equipped Teslas. He also gave us…