The business case for smart meters has all but evaporated. A typical user could save MUCH more money by simply driving a bit more economically !
Engineering group had a talk locally not long ago from an expert in the metering field, and his first slide was of the "MPG display" from his car. He asked for a show of hands as to how many people looked at this in their own cars - quite a large proportion. He then pointed out that to estimated £150/year saving from a lighter right foot would dwarf the now estimated £20 or so (is that the latest figure ?) to be had from smart meters.
He then went on to demolish the arguments being used for them - by way of showing all the elements of savings including in the claims which won't happen.
For example, one projected saving was for the DNOs by using the meters for remote sensing of supply voltages to premises instead of having to install (whether temporary or permanent) dedicated monitoring equipment. Guess what ? Can't be done because ... you'll love this ... the spec they came up with for the meters doesn't have accurate enough voltage measurement & reporting
Given that the rise of embedded small scale generation has resulted in a lot of "re thinking" about voltage control, having a voltage probe in every premises could have been rather useful.
IIRC, the ability to tell you what the prices would be for the next few periods was also absent.
As it happens, I'd been to a talk he'd done about 10 years earlier - and it was noticeable that his talk was "rather less positive"
due to all the stuff that now wasn't.
But what DOES remain in the business plan is the demand control. When the wind stops, the sun's gone down, and people fancy having tea (or dinner depending on your upbringing) at tea (or dinner) time - then the cost will go up to discourage demand. If that doesn't work, then in extreme you get localised disconnections. 1974 again, but on a more granular basis.
But politicians have been sold on the lies, and now there is too much momentum in the bandwagon for anyone to admit that it's not going where it was first claimed.