ktetch-pirate writes "On this day, 10 years ago, Bram Cohen released the first bittorrent client to the public. Most P2P protocols have had a rapid rise and then a drop-off as the next best thing has come out, but after 10 years, nothing has bested bittorrent, and it still remains king of the p2p castle. Just when will it be bested?" Link to Original Source
If it happens once, it's a bug. If it happens twice, it's a feature.
If it happens more than twice, it's a design philosophy.