Explore the power of Read-Eval-Print-Loops (REPLs) and their impact on software development feedback cycles in this insightful 50-minute conference talk. Delve into the history of exploratory feedback loops and discover why REPLs revolutionized early programming environments. Examine the evolution of iterative feedback in software development processes through the lens of "REPL nature" and learn about the limitations of traditional theory/experiment cycles. Gain valuable insights into what makes for better feedback loops at every level of the software process, from algorithm building to business intelligence. Walk away with a new rubric for evaluating and improving the iterative circles in your daily work, and understand how to seek exploratory feedback for more effective software development.