Your original question did not specify on Cable and Broadcast only. I mentioned upcoming animated shows, even though they are on streaming. Technically, most people watch Netflix on their TV sets, so it counts as TV.
Well, according to the study I just linked but you didn't read:
26% of total respondents have a traditional TV package, which includes cable and broadcast.
I imagine the number of cable subscribers to be higher for older audiences, but for the 18-34 age group, there is a growing number of people who don't subscribe to cable and just watch via streaming.
"About 147.5 million people in the U.S. watch Netflix
at least once per month, according to eMarketer’s July 2018 estimates. That’s followed by Amazon Prime Video (88.7 million), Hulu (55 million), HBO Now (17.1 million) and Dish’s Sling TV (6.8 million)."
"Traditional cable and satellite TV is in decline. Traditional U.S. pay-TV providers saw a record 3.7% drop in 2017, to 94 million households."
Also, people do watch the broadcast shows like CW's Riverdale, but only when the shows are on Netflix or Hulu.