One more the author forgot was the radio button on the floor similar to the high beam button. My father owned a 59' Cadillac Eldorado Barritz Conv which had the (factory) floor mounted button to change the pre-set stations.
Come to think of it, the auto builders should also incorporate the "speed warning feature" that you could calibrate with a little nob from the speedo. This option came with many cars of that era. I guess the "cruise control" invention made that feature obsolete.