Yes indeed. I agree entirely. I want to be clear about that first.A large part of what Rosen demonstrates in Life Itself is that the Newtonian view does indeed make strong claims about reality.
This would be the case for paradigms that are "incommensurable." If the reality claim is retained, they are incommensurable as you say. My recommendation is to drop the reality claim on both sides, and treat both as alternative approximations to reality. Then the issues is what are they good for describing that we are interested in? I don't know how Rosen would feel about calling his view "real" or "just a model" but I think it would be consistent with his own views to call it "just a model" even though all who see his vision (myself included) have the feeling that we just got closer to reality by at least one big step.So I feel that one must choose their paradigm (Rosennean, Newtonian, or some other) and adhere to it, otherwise one is inviting deep inconsistencies.
The only caveat, then, is that those doing Newtonian physics may realize they existOne can certainly do Newtonian physics ..., as long as we realize that those Newtonian models represent only a very small amount of physics, and that the Newtonian formalism and its corollaries is invalid as a universal paradigm.
or they may not. The engineer designing a new car can think mechanistically without running into much of a problem; keeping functional complexity a hidden aspect of the job that surfaces in design, operation & maintenance (preventing all those processes that wear and convert the mechanism back to elements or give it a different function), marketing, social norms, professional training, etc. with the usual compartmentalization of those aspects that in the larger reality exist in an evolutionary relationship with the design. Detailing the compartments in this example is meant to clarify both the larger complexity, and also the practical / social need to break it down into compartments. There would be similar analogies with physiology, cognition, .. anything engagine living process.within the Rosennean paradigm