Now that you mention it, Tim... mono radios (and all AM at that), mono record players, black-and-white TVs with no remote; all with tube amps (you could see the orange glow through the grille). Percolators. Cars with fins that needed oil changes and brake jobs every time you turned around and swilled leaded gas in large amounts; however, it was only $0.29 a gallon, and sometimes less.
Abandoned technology. If you didn't know how to change the needle on your record player, you'd better find out how, and if you were foolish enough to let the kids play the records, expect what you get.
Two-channel stereo transmission was first demonstrated from the stage of the Paris Opera in 1881, via telephone wires. However, professional sound engineers were recording performances using three channels and fast tape speeds as early as, maybe, the late Fifties or early Sixties (it was invented in 1931, the same year as the patent for two-channel stereo recording on grooved wax platters). Leopold Stowkowski and the Philadelphia Orchestra's recording of Scriabin's Prometheus: Poem of Fire, is the earliest surviving two-channel wax platter stereo recording (thanks, Wiki, for the data points).
Anyway. Back to our program on the skill level of amateur pianists...