I can't wait to build against an API whose outputs can radically change by the second! Usually I have to wait for the company running the API to push breaking changes without warning.
Abstractly, who cares what format the information is shared in? If it is complete, the rigidity of the schema *could* be irrelevant (in a future paradigm). Determinism is extremely helpful (and maybe vitally necessary) but, as I think this intends to demonstrate, *could* just be articulated as a form of optimization.
Fluid interpretation of API results would already be useful but is impossibly problematic. How many of us already spend meaningful amounts of time "cleaning" data?