In episode 91 of Thinking Elixir, José Valim returns to continue with part 3 of our 5 part series as we count down to the 10 year anniversary of the Elixir project we know and love. In Part 3, we talk through the Elixir releases of 1.7, 1.8, and 1.9. We talk about the unification efforts between Elixir and Erlang. These came through changes to error stacktraces, how documentation is stored, a unified logger, and more. We learn how features like Mix.target made a big difference for the Nerves project. We also hear the call for contributors to help bring a few remaining date/time features to Elixir. The big feature in Elixir 1.9 was the addition of deployment releases and the early efforts at managing config for releases. We thought this would be a short episode but found there was a lot to talk about and learn!