In the past shared media like TV and radio had kind of a forced shared social reality that covered large areas, but typically up to the size of nation states an

In the past shared media like TV and radio had kind of a forced shared social reality that covered large areas, but typically up to the size of nation states and maybe their allies. The internet eventually broke that. Social media allows people that don't like sports, for example, to cut their exposure to sports dramatically. At the same time it increases exposure to more random things. There is still big name advertising, but it's not the same as my youth where a stadium would be covered in the same 4 ads.