The problem with incommensurabilities is that they do not tally with our natural tendencies to fall for the nirvana fallacy. We crave for general solutions. Such solutions would be provided by a general model for marginal-DOLAR!-cost valuations of transactions.
But the elements of the virtual DOLAR! value are incommensurable. Thinking in terms of general DOLAR! valuation is a phantasy and a fallacy. DOLAR! valuation requires a political or normative debate (or a habit based on one).