There was a decent discussion on these a few weeks ago: https://news.ycombinator.com/item?id=26232760 https://news.ycombinator.com/item?id=26232760 And a few m

There was a decent discussion on these a few weeks ago: https://news.ycombinator.com/item?id=26232760 https://news.ycombinator.com/item?id=26232760 And a few months before that: https://news.ycombinator.com/item?id=24601479 https://news.ycombinator.com/item?id=24601479