Minor observation from someone who lived under communism and still remembers it: the commies got nothing correct, except for the idea that extreme wealth inequality is a problem. And that idea is not specific to communism.
Most things that people think "commies got correct" were an accidental side-effect of shortages or other issues. And as for urban planning, this is not specific to communism. The fact that it is in bad shape today in Poland is a result of mismanagement, lobbying and bribes.
Communism is a terrible idea. I repeat this often, because I see this idea re-appear in an idealized form, often propagated by younger people who do not fully understand it.