This is a rewriting of history. Social democracy used to be really big on nationalizing whole industry sectors, to the point of being little different even fro

This is a rewriting of history. Social democracy used to be really big on nationalizing whole industry sectors, to the point of being little different even from self-described "democratic socialists". This changed starting from the 1980s as it became clear that nationalized enterprises are almost always severely dysfunctional. Today, social democracy mostly agrees with social liberals and neoliberals that nationalization should be used very rarely and sparingly - mostly wrt. inherently-monopolistic "platform"-like businesses such as railways, power grids or telco infrastructure. And even then, these "platforms" should be open for multiple private competitors to operate on, as opposed to providing monopolistic services of their own via vertical integration.