BTW: has been posted here several times before, eg <a href="https://news.ycombinator.com/item?id=16084575" rel="nofollow">https://news.ycombinator.com/item?id=16084575</a><p>And the follow up Part 2:
<a href="https://news.ycombinator.com/item?id=16251307" rel="nofollow">https://news.ycombinator.com/item?id=16251307</a>