Previous threads:<p>Part 1 <a href="https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=9443028" rel="nofollow">https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=9443028</a><p>Part 2 <a href="https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=9483997" rel="nofollow">https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=9483997</a><p>Part 3 <a href="https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=9645499" rel="nofollow">https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=9645499</a><p>Part 4 <a href="https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=9835285" rel="nofollow">https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=9835285</a>