At some point, just about every company must deal with a hard truth: products get old. It isn’t so much that there’s a precise expiration date, after which your offerings are suddenly dated. But often, leaders have a moment when they recognize that a product line is getting long in the tooth and realize it’s time for a refresh — even if it’s still thriving and popular. With the substantial development timelines of many modern complex products, failing to innovate to counter the subtle creep of obsolescence can turn a leader into a laggard.