In episode 87 of Thinking Elixir, José Valim returns to continue with part 2 of our 5 part series as we count down to the 10 year anniversary of the Elixir project we know and love. In Part 2, we talk through the Elixir releases of 1.4, 1.5, and 1.6. We still manage to sneak in discussions about some new things in Elixir 1.13 and the upcoming release. We go deeper on GenStage, Registry, and growing up through production releases. We also learn about the history with unicode while touching on the recent unicode security issues that hit everywhere. We get some behind the scenes insights about the Elixir formatter and the complex logic required to bring ExUnit’s pretty diff features, and more!