I think you can look at different lenses of success. Vietnam successfully defeated a much, much more powerful imperial force. They have fewer freedoms, and are still recovering from the generational damage dealt to them, and they are hardly without plenty of valid criticisms. But they've had successes.

China is a major global power. I think you'd have to accept that China is successful, even if that success doesn't reach every person. And I think it's fair to point at China and ask just how communist it really is. (Then again, I think it's fair to point at the US and ask how idealistically capitalist they are.)

Cuba has some of the highest literacy rates in the world, they have a developed medical care system with lower infant mortality, high vaccination rates, and they have developed their own effective vaccines for things like covid. They've eliminated measles. They enjoy a longer life expectancy than US citizens. And they've achieved those successes with an embargo that has made it difficult for Cuba to trade globally.

This is why I was probing for rubrics, because I think one can definitely find success in communist governments, and you'll also find corruption. And you'll find crime and war. And there's no clear story of "across all axes they are successful".

Would I rather live in any of these? It's complicated! I think there are very few countries right now that are primarily focused on the welfare of their people.

If you’re open to a wider discussion.

Norway's and Alaska’s use of oil wealth to subsidize their population via state ownership of that wealth is very communist in nature.

Ancient Rome’s huge grain dole similarly was quite communist in nature: https://en.wikipedia.org/wiki/Cura_annonae

America’s freeing its slave population is similarly redistribution of the means of production to the general population. Which seems strange to modern ears, but the communist manifesto 1848 predates the US civil war 1861–1865.