Tim Cook invokes Steve Jobs in his last message to Apple employees—just like he did when he became CEO

Today marks a historic turning point for Apple. After 15 years at the helm, Tim Cook is no longer the company’s CEO. Instead, John Ternus is stepping into the role —only the third person to do so this century. The first, of course, was Steve Jobs, whose impact on the company and industry has not lessened in the years since his passing. One his last day as…