The point is that 99% of the contracts have no "dynamic prices", they have few different tariffs established up front an year for the next. In this case you do

The point is that 99% of the contracts have no "dynamic prices", they have few different tariffs established up front an year for the next. In this case you do not need a smart meter to shift load. You simply look at the "current year tariffs" and that's is. If we have dynamic prices than we need a standard data bus for every home appliance connectable to a personal automation or directly to the meter, without that manual load shifting is extremely limited. In France there is a VERY LIMITED system allow a two wire connection for big appliances were the meter simply tell "cheap or expensive" state and the appliance now that "now the electricity is cheaper, now more expensive". It's way too limited. New homes have since some years a mandatory mitering but without dynamic prices and made to be piloted and throttled loads it's just expensive eye candy stuff. Personally I have automated via HA as much as I can but such automation is essentially just switches HA can open or close via Shelly integration, there is no real smartness in all appliances even if it's damn cheap adding it from the initial design phase.