Afek et al. characterized the formation and stability of policy atoms, groups of prefixes that share the same Autonomous System (AS) paths as observed by BGP collectors, a concept initially defined by Broido and Claffy in 2001. Policy atoms provide a valuable perspective on the inter-domain routing policies in the Internet. With the rapid growth and increasing complexity of the Internet since these studies, we believe it is important to reassess the implications and applicability of policy atoms. In this paper, we revisit the policy atom concept after two decades and replicate the study performed by Afek et al. to assess the current state of AS path sharing and shed light on the evolution of policy atoms. We demonstrate that the Internet still operates on the level of policy atoms rather than individual ASes, as prefixes within the same atom tend to experience changes in AS path simultaneously. We apply the concept of policy atoms in IPv6 and find that this observation also holds true for IPv6 prefixes. We also relate trends in the characteristics of policy atoms with the development of inter-domain routing policies. We highlight new insights generated by the perspective of policy atoms and their potential for further applications. Our code is publicly available to support reproducibility and to encourage future research on this topic.