There is a bit more info here
https://www.french-property.com/news/mo ... ers_linky/The situation is a bit more straightforward with the electricity supply monopoly in France but there could be still be security problems with the data links.
If the meters are like the UK ones they will have a remote controlled cut off switch and the security of the data link is not that difficult to intercept if you know how. There is a possible criminal threat that the baddies could cut off supplies either to individual consumers or all those in an area.
Once the electricity suppliers can read meters whenever they wish this opens the door for time varying tariffs.
Not just off peak cheap leccy at night as we are used to but high charges a peak times say 17:00 to 19:00.
One they can control on/off it provides a mechanism for load shedding.
This is highly desirable from the supply side when like now both the UK and French grid are close to breaking point.
I believe that in France there are already tariffs where on certain days there is a high probability of being cut off and this may be being done via the KVA limiting switches but In UK we don't have this and we don't really want it either.
Bob