I am familiar with them because I was born in the late 70s and grew up in the 80s before cable was ubiquitous and there were, even with UHF, still less than 10 channels and most of them were broadcasting old programming i.e. old Warner Bros. cartoon shorts, I Love Lucy, the Andy Griffith Show, and so on. FOX, for example, was still new and pretty much aired nothing else.
Today with every home getting hundreds of channels of new and original programming and the endless distractions of video games and the internet do children ever get the opportunity to enjoy the timeless classic cartoon shorts?
PS- Man do I feel old now!