I watch every show with subtitles, sometimes in two different languages at once. For instance if it’s a language like French that I am working harder to understand the spoken version of, I will have both the French and English subtitles going. (Note this article conflates “subtitles” and “closed captions,” which are in reality two different things, so I will as well.)
But most of the shows I watch are in English, though that is decreasing all the time, and I turn on the subtitles because there is so much barely-audible dialog and general poor audio that it helps me avoid rewinding so frequently.