I’m 51 and I can’t remember ever going to a house with only one TV. Even my grandparents had multiple TVs and I definitely had one in my room since I was 4.
A quick Google search says that 50% of households had more than one TV in 1980.
Same. I grew up in the 80's and we always had at least 2 TVs for a family of four. My sister and I both had small TVs in our bedroom once we were teens, so that was one TV per person at that point! To be fair, they were mostly used for video games...