OP here - I wrote extensively about, that's why I linked to existing article rather than explaining once more, and focusing on the why and how to build one. See

OP here - I wrote extensively about, that's why I linked to existing article rather than explaining once more, and focusing on the why and how to build one. See also comment above: https://news.ycombinator.com/reply?id=44960004&goto=item%3Fid%3D44953575%2344960004 https://news.ycombinator.com/reply?id=44960004&goto=item%3Fi...