Very cool! I spent a lot of my youth navigating Teletext. Also lots of people doesn't seem to realize that Teletext is still alive and updated daily in some European countries like Spain.
https://www.spreekbuis.nl/npo-en-nos-over-de-toekomst-van-te...
(I’m not going to argue about where to drawn the line between ‘hugely’ or merely popular etc)
It's not unlike twitter in that sense.