[bombela]

You are right, the seek slider was never common. My initial comment was more general.

I too wish for a motorized light switch. One day I want to make one (I feel that I am slowly reaching the required skills and tools to build it). Of course, the house insurance might not like it.

edit: To be clear, the motorized volume knob was common on consumer devices. It is merely a potentiometer with a motor attached. As far as I knoe it had no sense of position, just turn it until it reaches a hard stop, and the motor is too weak and simply stall. Motorized sliders were and are still common on mixing tables, for sound and light control, and those seem to have positional accuracy. It is quite fun to watch a mixing table move by itself during a performance. I have never seen them used for seek control.