Introduction of Type Inference in Elixir v1.20 Release Candidate

The announcement celebrates the milestone of Elixir's 15th anniversary alongside the introduction of the first release candidate for version 1.20. This update promises improved type inference capabilities for all constructs, allowing for more precise function evaluations and overall better performance when compiling. Developers are encouraged to report any false positives in type inference and variations in compilation speed compared to version 1.19. The blog post goes into detail about the implications of these changes on existing libraries and the handling of AST metadata. It addresses common concerns such as how type mismatches will be caught during testing and the importance of negative test cases in production applications. There's a general excitement around the potential of this update, with developers sharing their experiences and expectations for improved type safety without sacrificing performance.