June 20 2016 HN links

https://news.ycombinator.com/item?id=11925201

https://news.ycombinator.com/item?id=11931068

https://news.ycombinator.com/item?id=11933427



https://news.ycombinator.com/item?id=11916149

https://news.ycombinator.com/item?id=11918741