We make shite toasters now.
The Americans had this sewn up a few decades ago.
"There are no levers to press down. Just put the bread in the slot. The weight of the bread activates the heating elements, causing the center wire to lengthen microscopically and the bread to be carried into the toaster under its own weight.
Inside, the Radiant Control thermostat monitors the heat radiated (not conducted) from the outer surface of the bread, which is directly proportional to its color change. There are no timers. The toast is raised only when it is properly toasted; no sooner and no later.
When the thermostat opens, the elements cool, and the center element wire contracts. This movement is very small — on the order of thousandths of an inch — but a mechanical linkage multiplies this movement approximately 175 times. This is sufficient to operate the carriage and raise the toasted bread from the toaster."
The crap we have now is primitive in comparison.