Abstract: The presence of an anomalous cosmic-ray positron component at energies coinciding with the favored mass range of dark matter candidates has spurred great interest in the past several years. Simple models have sought to ascribe this excess to astrophysical sources, which would disfavor dark matter scenarios. I discuss why the assumptions in these models concerning cosmic-ray propagation are likely too simple along with the implications that follow from changing them, including the potential role of dark matter in light of recent data from AMS-02.