All of the continental Nordic countries, (Denmark, Finland, Sweden, Norway) are already in a single unified transmission grid and electricity market (Nordpool).

All of the continental Nordic countries, (Denmark, Finland, Sweden, Norway) are already in a single unified transmission grid and electricity market (Nordpool). The other half of the article was about building a new link between Sweden and Finland. The self-sufficiency here is therefore purely mathematical. And yes, Finland definitely has one massive hostile neighbor who started this war and caused this energy crisis.