The answer to "why" is answered in these comments:
https://news.ycombinator.com/item?id=6168052 https://news.ycombinator.com/item?id=6168541
The answer to "why" is answered in these comments:
https://news.ycombinator.com/item?id=6168052 https://news.ycombinator.com/item?id=6168541