Nice article! I had rediscovered teletext for myself a few years ago, only vaguely remembering it existed (or something similar) in select cities in the US when I was a kid, but it was not something I paid much attention to. Getting interested, I began to wonder if you can set up your own teletext service.
Naturally, you can: https://www.raspberrypi.com/news/create-your-own-teletext-se...
For those like me who weren't familiar with the service or lived in a country that really didn't have it, there's this informative site: https://teletextarchaeologist.org/
Edit: Sorry all, it looks like teletextarcheologist.org went dormant, so the archive no longer seems to be working.