"Tradition is not the worship of ashes, but the preservation of fire." - Gustav Mahler
People often use the word 'traditional' to lend weight to the ideas or products they are trying to sell. As Richard Dawkins points out in his critique of alternative medical practices which claim to be based on 'traditional' medicine: just because an idea is old doesn't mean it's right.
But there's also the point that things made, or thoughts inspired, by the heart, the abode of the Self, tend to last over time. Time exposes the flaws in works which may initially appear original but are actually based on ego and conditionings. Over time, egoistic things appear idiosyncratic and ugly; things produced by conditioning appear old-fashioned or derivative.