One of the strengths of hacker news is how the core site hasn't really changed (no broken links on any story back to ~2007 as far as I can tell). This steadiness is a rare and valuable feature.
The fact that they do this yet also expose the data and access to enable a proliferation of cool alternatives views like this one is extremely user-friendly. Unfortunately, the rest of the internet seems to be going in a different direction and locking things down.