Although I have never lived in a commune so don't know firsthand if it's true or not, I've been told that the downfall of the commune was that relationships got in the way of their effectiveness. Too me, it totally makes sense that they would work better as people got older.
Divide up the chores and have lovely evenings around a campfire chatting and laughing. As people got older and perhaps needed assistance, it makes too much sense to pool the resources and have a nurse or someone to help on site and save anyone from going to a nursing home. The financing might get complicated, but if everyone went in on an equal basis, it might work. OR some could contribute financing while others contribute in talent - whether that is cooking, gardening, or whatever.
I think as we get older, we appreciate the true meaning of friendship more and a commune could work. I wonder if there are any out there already?