Sites like Hacker News, Stack Overflow, old.reddit.com, and many more greatly benefit from JS. I made GoatCounter tons faster with JS as well: rendering 8 charts on the server can be slow. It uses a "hybrid approach" where it renders only the first one on the server, sends the HTML, and then sends the rest later over a websocket. That gives the best of both: fast initial load without too much waiting, and most of the time you don't even notice the rest loads later.
