One of the many flaws of such immaginary worlds is thinking that people will be content to live in a system where they have no creative outlet left and nothing they do will have any ultimate meaning.
People in those conditions might burn down the system for the mere excitement of novelty. Even experimental rat utopias quickly degenerate.
If you’re thinking Scandinavian countries they are mixed economies. Most successful economies today are mixed economies.
On the sliding scale of welfare state socialism, Finland and Norway have the greatest degree of public investment. Angola would be on the other side of that spectrum, with almost no public services or redistributive programs offered.
Socialism is very well defined and it's made nebulous only to claim virtues it doesn't have.
Scandinavian countries aren't socialist. They themselves say they are not socialist and a simple google search for "are scandinavian countries socialist?" will show you that the consensus is that they are not.