This is a financial cold war—nothing more, nothing less.
While there are billions of reasons to cut output, and every major producing country is reeling from the loss of revenues, some are weathering the current bust better than others, but the devil is in the details, and the details contain tons of variables.
Production cost and breakeven figures that analysts enjoy bandying can trap you in bubble of black-and-white mathematics that is a few brush-strokes shy of a full picture.
Breakeven prices are hard to pin down, and harder yet because they fluctuate. OPEC governments downsize their budgets, cut social spending and put big projects on hold to lower the breakeven price. Independent producers likewise cut spending and delay development to get closer to a feasible breakeven. So the breakeven is elusive.