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If your customer base is aging with you, then eventually you are going to become obsolete or irrelevant. You need to be constantly figuring out who are your new customers and what are you doing to stay forever young.

"Jeff Bezos: A Down-to-Earth CEO Reaching for the Stars" by Joanna Stern, abcnews.go.com. September 25, 2013.
If your customer base is aging with you, then eventually you are going to become obsolete or irrelevant. You need to be constantly figuring out who are your new customers and what are you doing to stay forever young.