People need to seriously stop it with the whole reddit-esque Boston Marathon Bomber investigation-style low-info crusades. Its extremely unhealthy for both your own mental state and the state of discourse on the internet. Even if Cursor misbehaved (they did not): Your life is not materially changed whether they did or did not. Use it, or don't use it; these things are a matter that lies exclusively between Cursor and Moonshot.
A note on terminology: Throughout this post I refer to "the BEAM." BEAM is
the virtual machine that runs both Erlang and Elixir code, similar to how the
JVM runs both Java and Kotlin. Erlang (1986) created the VM and the
concurrency model. Elixir (2012) is a modern language built on top of it with
better ergonomics. When I say "BEAM," I mean the runtime and its properties.
When I say "Elixir," I mean the language we write.
This is gonna rankle folks who like one or the other, but they're basically the same language. When it comes to languages that run on the same VM, Erlang and Elixir are very close together. They aren't nearly as far apart as say, Java and Clojure.
Elixir adds a few things (a lisp-style macro system, protocols, UTF-8 as the default string type, a builtin build tool, streams) but Elixir is not a huge departure from Erlang in the way that Clojure is a huge departure from Java.
By far the biggest things you're going to learn when you learn either one are going to be the BEAM runtime itself and the OTP libraries, which both Elixir and Erlang have in common.
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