In the long view of history, all societies will fail. Is three generations of success enough to qualify it as a success? I don't know. But it's subjective to say it failed.
But that's like saying Mars isn't necessarily a better planet for humans than Earth because eventually the entire solar system will become uninhabitable.
Perfection is not required for one system to be better than another.
Communes don't work. Most never get off the ground. The ones that do rarely make it longer than a decade. And there are basically none that have lasted longer than a century (the only group I am aware of in North America are some sects of Mennonites).
Whereas essentially the entire developed world lives and thrives without the concept of communal property (outside of marriage).
