There was a long thread about them two months ago, with the founders answering some questions on that topic. https://news.ycombinator.com/item?id=16159808 http

There was a long thread about them two months ago, with the founders answering some questions on that topic. https://news.ycombinator.com/item?id=16159808 https://news.ycombinator.com/item?id=16159808