This study evaluates the influence of neighbor-induced changes to the local environment of a droplet in a dense spray an the droplet breakup regime. To this end, previously published breakup data exhibiting a mismatch between the expected isolated droplet breakup transitions and the observed breakup transitions within dense spray environments are re-examined. We find that secondary breakup of droplets within a dense spray is adequately described by the criteria developed for isolated droplets if neighbor-induced changes to the local environment (increase in local vapor concentration, drag reduction caused by leading droplets, and surface tension variation with liquid-gas density ratio) are correctly taken into account when evaluating the criteria for breakup regime transitions.