This has been discussed ad nauseam:

https://news.ycombinator.com/item?id=35839470

https://news.ycombinator.com/item?id=38936102

https://news.ycombinator.com/item?id=27079862

https://news.ycombinator.com/item?id=32491840

https://news.ycombinator.com/item?id=31177943

https://news.ycombinator.com/item?id=35688117

https://news.ycombinator.com/item?id=38969077

https://news.ycombinator.com/item?id=37127909

https://news.ycombinator.com/item?id=35876290

https://news.ycombinator.com/item?id=34972384

https://news.ycombinator.com/item?id=33786580

https://news.ycombinator.com/item?id=38797713

https://news.ycombinator.com/item?id=39457875