You're right, but, like a lot of old-but-new things on HN, I hadn't heard of Etherpad, or read pg's praise of it, before this article. There are probably a lot

You're right, but, like a lot of old-but-new things on HN, I hadn't heard of Etherpad, or read pg's praise of it, before this article. There are probably a lot more people like me reading the Atlantic, than people like you, to whom it's all old news.