>So even if the "experiment" would have stopped right then and there and they would have switched to pure capitalism, what kind of development would you have expected?
this is exactly what was done when the things hit the rock bottom. It was a choice - either continue the "experiment" and everybody dies from hunger ... or pause the "experiment". They paused it. It is called "New Economic Policy" - remotely similar to what China does today. Allowing limited capitalism. As result the country almost immediately rocketed into economic recovery.