previous discussions:<p><a href="https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=3808194" rel="nofollow">https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=3808194</a><p><a href="https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=2450973" rel="nofollow">https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=2450973</a>