Essays, like good literature, become more relevant and certain times. A major event could happen (Groupon turning down Google) and a PG essay could shed some li

Essays, like good literature, become more relevant and certain times. A major event could happen (Groupon turning down Google) and a PG essay could shed some light on the situation, even if it was written years ago. Likewise, new situations can cast a different light on what was once written. HNers posting relevant and timely links to old essays is a good thing.