"Teletext is a surprisingly good internet substitute for basic information consumption"

I agree. Teletext feels like it would have been a perfect service for a mobile phone.

In the UK, the BBC stopped transmission of their teletext service (Ceefax) in 2012. One of the limitations of the service for writers was that it could only display four paragraphs of text on a single screen. This meant any news or sport story had to include all the key points in just those four paragraphs. This forced journalists and writers to be concise and to the point. (It's actually a great writing exercise to try on any news or sport story, or even essay)

Now in the digital age we have apps like Yahoo Digest/Summly that give you concise summaries of the news with large photos (after you've downloaded the 30mb phone app). But teletext did plain, concise text from the start (with real writers) because of the constraints of the technology. And those constraints turned out to be a large part of the appeal of teletext.