I would strongly disagree that it’s impossible. There’s significant evidence of societies operating at or near a position that can reasonably be described as communism.

My point of contention would be whether communism is more desirable than socialist workers’ democracy, the supposed intermediate stage, rather than whether it is possible.

The desire for a stateless, moneyless society correctly identifies many of the problems of states and money, but often glosses over what problems states and money themselves address.