Four months ago: https://news.ycombinator.com/item?id=20477212
Six months ago: https://news.ycombinator.com/item?id=19839104
Ten months ago: https://news.ycombinator.com/item?id=18996200 and https://news.ycombinator.com/item?id=18766709
Also, 2017: https://news.ycombinator.com/item?id=14283659
2015: https://news.ycombinator.com/item?id=10781894
2014: https://news.ycombinator.com/item?id=8785894 and https://news.ycombinator.com/item?id=7141152