Re: On switch location
TV: By the plug socket. Microwave: combination of setting the timer and closing the door. Kettle: on the back. Toaster: on the side. Fridge & freezer: by sockets behind the appliances. Cooker & central heating: anonymous switches on the wall to one side.
The most obvious devices with separate power switches are: VCR+TV and DVD player+TV. VCRs date back to late 70's. PCs (DOS) did not reach PHBs until the early 80s, so there was some hope that people could understand a display device and the device that creates the picture can have separate power switches. At the time it was widely believed that adults were too stupid to program a VCR* and they had to ask a five year old child to do it for them. Perhaps it was hoped that five year olds would grow up and dinosaurs would become extinct leading to the happy situation where everyone would have enough brains to program a VCR with a separate power switch to the TV.
*Note to millennials: A VCR is a stone age alternative to BBC iPlayer and youtube. Programming involved reading a magazine to find the channel, start and end times of the required show. People had to get off the sofa, walk to the TV, switch it on, and press a button to select the VCR channel. Next the VCR power state had to be set to on, input select to antenna, output select to TV then the frequency knob had to be twiddled to get to the right channel. At this point, the TV becomes superfluous and can be turned off. Press the eject button and remove the cassette (stone age USB memory stick) and put it away. Refer to your notebook (a device made from multiple sheets of compressed pulped dead trees) and pick a page where the last entry is a for a TV show no-one wants to watch again. Cross out the last entry on the page and write in the name of the show you want to record. Look at the number on the top of the page and select the cassette with the same number written on a sticky label on the back. Insert the cassette into the holder and press the holder back into the VCR. Press the rewind button.
Now things get tricky. Look around for the home's most reliable time source. Probably a battery powered clock. Check the second hand is moving and the time vaguely corresponds to the position of the brightest visible star. Compare this to the time display on the VCR and if necessary set the time selector "Time ADJ" and press the hour and minute buttons so the VCR displays the approximate time. Next select "Timer Set" and press the hour and minute buttons to about five minutes before the advertised start of the required TV show (Stone age technology did not include network time servers so all clocks were off by a few minutes, also broadcasters occasionally started a show a little early to annoy VCR owners). Advanced VCRs had a stop time. If present it had to be set at least half an hour after the scheduled end of the TV show. Failure to do this caused an extended news report that delayed all subsequent programming for the day. Almost there: when the tape has finished rewinding, press "stop", set the power selector to "Timer" and press "Play" and "Record" at the same time (the buttons should lock into place.)
40 years ago, five year olds were able to do all this. The engineers who came up with separate on switches for computer did not anticipate that a decade later the brains of over half of those five year olds would rot down to the level required to elect Amber Rudd.