That would be especially interesting for hours with negative energy prices (at least once they become accessible for retail customers). Also various appliances like washing machines or dish washers can be timed
In theory. Then the fire department comes and says "do not run washing machines and dish washers while you're asleep or away". And with that you're back to running them during peak hours.
We just had that discussion in the media here, due to the introduction of peak power as a part of the electricity bill.
https://www.nrk.no/livsstil/advarer-mot-oppvaskmaskin-om-nat...
https://www.nrk.no/osloogviken/bonn-fra-brannsjefen-i-fredri...
They know because they have to put out the fire in the middle of the night, and they do an investigation afterwards to determine the cause of the fire so they know it was e.g. the washing machine.
People getting paid to charge their cars because the grid has a surplus of (probably green) energy.
One of them is trying to install a heat pump too to double down on this approach.
It rarely gets discussed in the media for some reason.
I have done some work with the Octopus systems and they are very new an agile, but don't handle the complexity that the big 6 have put in place over several decades. The overall metering and settlements business in the UK is quite complex especially including legacy gas and elec accounts and meters.