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Yes it is nice language, but why the author did not create a ruby implementation over Beam? Maybe elixir has extra features than ruby, so why he does not create a superset of ruby? Try to image all ruby gems that support the feature of Elixir at zero cost, instead we have a new language new libs...

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Ruby semantics wouldn't map to BEAM cleanly. Pervasive immutability, error handling and concurrency constructs are very different between Ruby and Erlang, I don't think trying to bridge the gap would be an easy task.

Trying to map a superset of a different language to the Erlang VM would likely be much more difficult than the current approach.

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