most of the instances I could find were filled with liberal centrists who call themselves leftist, and hate actual theory-reading commies.
something politically like lemmy.ml or even like lemmygrad would be perfect.
it also shouldn’t be heavily defederated against
a society where economics don’t matter, so yeah communism.
labour is automated and optimised so that people actually get enough time to develop into decent humans, skill goes where it is needed and not where it is better compensated.
the rest of Marx’s opinions (like on family and religion) are shit imo