Previous discussions:<p><a href="https://news.ycombinator.com/item?id=7618657" rel="nofollow">https://news.ycombinator.com/item?id=7618657</a> (2014)<p><a href="https://news.ycombinator.com/item?id=2754986" rel="nofollow">https://news.ycombinator.com/item?id=2754986</a> (2011)