Well, if--as with a real highway--it destroys something irreplaceable, a vital ecosystem essential to human life.

FORBES: Medialand

There are two kinds of computer owners: those that backup their data, and those who will backup after they lose something irreplaceable.

ENGADGET

People who know and love the Barnes felt something precious and irreplaceable was in danger of being lost.

WSJ: Barnes Collection | Albert C. Barnes | Ensemble: Albert C. Barnes and the Experiment in Education | Saving Dr. Barnes's Vision| By Eric Gibson