Previous discussions:<p><a href="https://news.ycombinator.com/item?id=21082381" rel="nofollow">https://news.ycombinator.com/item?id=21082381</a><p><a href="https://news.ycombinator.com/item?id=21064663" rel="nofollow">https://news.ycombinator.com/item?id=21064663</a><p><a href="https://news.ycombinator.com/item?id=21073819" rel="nofollow">https://news.ycombinator.com/item?id=21073819</a>