Ask HN: How does Paul Graham write and maintain his essays?

Does he write a new essay every time and edit the HTML and push it to server? Or he has a web application in place, where he pushes an essay from different sources?

Also I am planning to create my own blog site(list of articles, based on tags, search etc). How should I approach it? I want to have my own blog site like that of Paul graham.

Also suggest the difference between static site generator vs building our own blogging engine for our site?