In my house I have a thing in a box outside and if I am using power the wheel behind the plastic turns around. There is no real need for second meter to tell me the same thing. OK it is not looked at much, but neither is the second one. In fact I don't have a clue when the batteries failed with the current transformer as I never bothered to look at it.
As to the washing machine yes it weighs the load, and it has jets of water which are claimed to reduce the water required etc etc. But how do you measure how clean things are? I watch an advert which shows some poor lad, who I am sure gets a lot of rib from his mates, where his mother has washed out the khaki and made the uniform non uniform, and instead look white, clearly over cleaned.
Same with fridge and freezer, there may be a case for not being so cold, but we all go by three temperatures 12°C for wine not a clue why, 5°C for fridge I will guess any colder and likely ice will form some where, and -18°C for freezer, which is freezing point of brine. No point knowing it is using SAEc or a percentage of the SAEc in general the unit fails to maintain temperature before it becomes economical to replace it so a simple thermometer is far more useful.
Yes I am one of those sad people who went around measuring everything in the house. But it did not change what we used so rather a waste of time.