Leaf and colleagues (2016) provided a definition and description of progressive applied behavior analysis (ABA) in the context of autism treatment in which a behavior analyst takes a structured, yet flexible, approach to treatment that is responsive to the learner and includes on-going, in-the-moment analysis of teaching. Since Leaf and colleagues' publication, there have been many research and dissemination advancements across the domains outlined in the original paper. This includes advancements in the types of progressive procedures implemented, instructional arrangements, progressive reinforcement strategies, preventive functional analysis, progressive discrete trial teaching, data collection, progressive curriculum development, and staff training. The purpose of this paper is to highlight these advances citing peer-reviewed research where possible. Although many advancements have occurred, there is still a great need in the field of ABA for more clinicians and researchers to evaluate and implement procedures associated with the progressive approach to ABA. The paper will conclude with a call to action for behavior analysts to move away from rigid, protocolized, and conventional ABA practices and move towards implementing progressive ABA.