Largely it's just worked. Products on the market are almost all efficient now because it's blatantly displayed on the front.

The most obvious difference left is on fridges. The amount of power consumed varies quite a lot and in ways that are not obvious. Small fridges use a shocking amount of power because they use less efficient coolers without compressors.

> Small fridges use a shocking amount of power because they use less efficient coolers without compressors.

This is only true of the tiniest fridges, the peltier effect ones that are about the size of a milk crate. Your typical mini fridge has a compressor.