Appliances that actually use energy should have this. I'd love to be able to put a wet load of laundry into my drier and press "make sure it's dry by tomorrow morning".
So, I do a bit of this myself, manually. I've got a table of appliances and wattages, both rated and measured (using a Kill-O-Watt). I also have a 6kW (max) solar panel installation, plus I'm on a time-of-day metered plan.
I try to make sure that anything that uses hot water (tankless full electric water heater; 29kW rated max) like the dishwasher and shower are done between 1000 and 1400, as that's the highest time of solar insolation during the day, plus the time of day turns over to the highest tier at 1400.
I've bought but not yet installed an eMonPi (https://github.com/openenergymonitor/emonpi), so theoretically I could automate some things to optimize when to run devices. As it is though, by tracking and actively trying to reduce consumption, I've already managed to keep my electricity bill to zero for years, even putting thousands of USD back into the grid (sadly, I do not get money back from this; it only counts as credit, and resets every twelve months).
As for your specific example, I line dry my laundry. I don't see the point of running a space heater (dryer) in my garage; it usually only takes a few hours to dry where I live anyway. The only reason I still have a dryer is for down sleeping bags and coats that have to be fluffed up.
That kind of thing already exists.
I've had a string of in-home energy monitors, and I've turned on all the relevent features for this, but at this point, I have disconnected everything from the internet to stop it being enshittified, and my local incumbent energy transmission provider has left all the consumer-facing smart meter services rot on the vine while the state of Texas kneecaps all the legislation that made it possible in the first place.
In short, all the industry and government entities involved have given up on the consumer here and have pissed it all away, and it's a shame.
As it is, if you have the knowhow you could do it yourself. But that's a lot to ask the tech illiterati, and even I find myself just falling back to manual methods since they Just Work with no fiddling about with wires.
I don't want any part of that system connected to anything that the utility companies have access to or control over.
I don't want that provided by third party companies that could go out of business overnight, and leave me high and dry.
I don't want to have to replace my electrical panels to get this information.
I do want this data all being collected and stored locally, but with a way to reliably back that information up to offsite facilities of my choice.
And it would be great if it could have a system that could apply intelligence as to which circuits/devices need to be powered when, in case of emergency or if I just want to optimize my power bill.
You’ll set your alarm for 6am and then the dryer will know to dry by then.
“In places with stagnant air, such as basements, moulds can produce a strong musty odour.”