Several previous discussions. Maybe Chris will show up again.

https://news.ycombinator.com/item?id=8447518

https://news.ycombinator.com/item?id=6291515

https://news.ycombinator.com/item?id=4561787

https://news.ycombinator.com/item?id=2621177

https://news.ycombinator.com/item?id=1645291