Don't forget the 1 or 2 UHF channels.
I am old enough that I remember not only the few channels, but also, the TV signed off with the National Anthem at midnight.
So if a person had insomnia, they didn’t even have infomercials to watch. No DVDs No VCR etc. and all the phones were dumb. LOL
UHF: Yeah, I forgot. In my time/area, very sporadic/lame content and that test pattern with the Indian head.