Time. If you think about it, time creates such a profound effect on almost everything we see every day. Water, along with time, created the Grand Canyon, mountain ranges on every continent.
On a scale vastly smaller is how vibration, over time, causes damage. With that in mind, from the website of Azima DLI, a guide depicting the severity of machinery vibration over time.:
Chart: Machinery Vibration Severity Guide
by David Manney