HN is a great example of a website that has not changed much fundamentally over so many years. Many other big social media websites are the opposite which have changed drastically over these years. C2 is a particularly weird example because although it still retains the text nature of its wiki, it has drastically changed from server-side processing to heavy use of Javascript to load content on browser making it a little slow to load.

What examples of old school websites you know which have not changed much in how they work in the last many years? The longer it has stayed the same, the better.