The Relativity Principle and the Kinematic Structure of Quantum Mechanics

In this paper, "Beyond Causal Explanation: Einstein's Principle Not Reichenbach's" we explain how the relativity principle, aka "no preferred reference frame (NPRF)," leads to the kinematic structure of quantum mechanics (QM), just as it leads to the kinematic structure of special relativity (SR). This advances QM from an operational theory to a principle theory on equal footing with SR. It has been 115 years since Einstein published his principle theory of SR and there is still no "constructive"  counterpart, i.e., there is still no causal mechanism a la the luminiferous ether to account for the light postulate. Likewise, it has been 85 years since Einstein, Podolsky, and Rosen (EPR) published their famous paper "Can Quantum-Mechanical Description of Physical Reality Be Considered Complete?" without a consensus constructive account of quantum entanglement. Perhaps it is time we abandon attempts to explain quantum entanglement via causal mechanisms just as we have abandoned attempts to explain the light postulate via the luminiferous ether?