Yeah. The rollout of domestic wiring standards was pre-EU, and dealing with the entrenched incompatible standardisation gets in the way of the EU goal of a single market in goods and services. They really don't want more arbitrary standards that vary nationally.
Of course, that's not quite the same as the laptop charger question where the fragmentation is between companies and less entrenched. But still.
Of course, that's not quite the same as the laptop charger question where the fragmentation is between companies and less entrenched. But still.