Same here in Germany, where regular operation of Teletext (or called "Videotext" here) started in 1979[1] and is still a thing. Surprisingly, I experience deaf people in my sphere using it. Of course, all the information is available on websites as well, but the strict form and reduced text amount per information in Teletext seem to make it very accessible for those who struggle with complexity of written language.
I think a common use case for this type of technology was subtitles for deaf people, so it's possible that they still use it out of habit. These days I think subtitles are probably sent to most TVs in a more modern fashion.
[1] https://de.wikipedia.org/wiki/Teletext#Deutschland