"Thank you so much for coming along with me on this incredible journey."
Well, isn't that precious? Five years is an 'incredible journey'?
Walter Kronkite didn't become Walter Kronkite in five years. He began with CBS in 1950 after a dozen years of reporting around the world. He was assigned anchor of the CBS Evening News in 1962 and stayed until his retirement in 1981 (19 years as anchor).
Tom Brokaw stayed until he retired.
Peter Jennings stayed until he died.
When Couric got the assignment in 2006, there was a lot of chatter about her being the first solo female anchor of a primetime network newscast.
She will go down in the history books with that distinction but she doesn't deserve it. She quit. She walked away. The so-called 'challenge' of her 'incredible journey' wore out and she moved on because in the end, everything she does is about her. That is the modern way.