After Walt Disney (the man) died, many decisions about the theme park were made after asking "what would Walt do?" The leadership wanted to keep the park as close to Walt's dreams as possible.
When Steve Jobs was dying, he made his future CEO Tim Cook promise to not let anyone ask "what would Steve do." Jobs wanted his company moving forward, not trying to keep the past alive.
Those are really the two options to face when making decisions. Will decisions be made based on what has always been done in the past or will decisions be made based on what is best for the future? Those trying to keep the past alive might stay safe for a time, but managing past successes rarely leads to innovation.