I also remember hearing about dial-up access being used during the internet shutdown in Egypt, but I don’t know how widespread that info was distributed or used within the country at the time.
Those are legitimate use cases but that was also ~15 years ago. The wiki that is referenced in the article sounds interesting but I don’t know much about this group or its motivations, but here it is:
The thing is dial-up was transmitting data via sound. It would be kind of interesting if that ever made a comeback for encryption purposes. Maybe not exactly through wires and modem, but I could see a universe where messages are sent via videos that can only be decoded by certain people that are recording the audio.
I don't know why we would do that though. Maybe someone else can riff off this idea.
