system
A chat on subreddit /r/wallstreetbets
human
All Scandinavian countries incorporate elements of socialism, which is a very broad term that comes in many flavors. As for full-blown communism or socialism not working, that is true of every ism in its absolute form. Absolute capitalism doesn't work either, except on paper.

gpt
These countries are capitalist market economies with like 5% socialism sprinkled in. Using them as good examples of socialism is not cool, since their socialist policies are getting carried hard by the capitalist free market.