Iirc france is still around 10% oil, despite the first rumours of their ban starting in the early aughts.

But that used to be a lot more common, these days it’s become rare outside of rather rural places for which a gas network is not economically viable. Basically as oil furnaces reached EOL, people would replace them with gas if they had a muni gas network (“gaz de ville”, literally city gas), because the country subsidised switching away from oil furnaces.

Belgium is still(!) planning on shutting down nuclear plants. Not sure how they justify the added dependency on Russian energy