It just takes too much time and effort to keep it up for multiple audiences. It’s not automated — it’s all about the curation. There are plenty of similar sites that cover many more airports though
Then things got way better with real browser engines like Webkit that could understand Javascript. That was something that I've personally hacked together as a contractor for an anti-piracy customer using Python, Webkit and Qt framework (PyQt) in around 2009. Shortly after some nice libraries in node/js came out like Phantom.js which would make this much better.
If I were to do this today, I'd use Playwright.