Hot fill washing machines
AFAIK these were phased out because by the time you had run all the cold through to get some hot water the washing machine was full.
OT for smart metering of course.
For the Kiwi posting to this thread, the mention of easily switching between suppliers is a dead giveaway. For this to work the smart meters would have to be built so any supplier could read any meter. It is suggested upthread that this is not possible. So the benefits of doing it right do not currently (!) apply in the UK.
Biting the hand that feeds IT
