See my reply here: https://news.ycombinator.com/item?id=37175685 https://news.ycombinator.com/item?id=37175685 Short version: it's robust to staleness and conc

See my reply here: https://news.ycombinator.com/item?id=37175685 https://news.ycombinator.com/item?id=37175685 Short version: it's robust to staleness and concurrency, which is important in distributed settings ("find the best" is hard to do when "best" is a moving target).