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Loads of people don't submit meter readings and end up with wild estimates.
Such a painful problem for them that they continued to not submit readings.
I'd say it's also pretty good for giving a better handle on what is actually costing you money, and how much, for gas and electricity.
Possibly... but then what? Now you have this information, what do you do with it? In the past, any kind of action based on it was at best fiddling with the edges as the energy was so cheap. Now, I agree, fixing something horribly inefficient (like an old immersion heater) might , long term, make a material difference to your finances. But now you can get the same, or better information via a smart plug, that you own.
That they solve a non-problem via an expensive and complex non-solution
Agree a problem that should be solved if it could be solved reliably and cheaply (think of all the five minutes you'll save!), but...
Solution produced at scale by the lowest bidder and rolled out by companies that DNGAF about end users and who benefit when the meters do not work - what could go wrong?