Board Thread:Questions and Answers/@comment-69.143.181.86-20121228002841/@comment-75.70.137.237-20121230175739

74.79.206.169 wrote: its for EE, it will have uses later, its just included now so that people dont have to restart there maps when the update comes

I'm pretty sure if there were an update that added a new ore, then chunks the player had loaded before (anywhere they ever walked) would have already been generated, but any new chunks loaded would use the up-to-date generator that would include the new ore. The world wouldn't need to be restarted.