Exactly. It was very important for us to figure out how well Elixir fits the type system, otherwise we would either get false positives or we would end-up relyi

Exactly. It was very important for us to figure out how well Elixir fits the type system, otherwise we would either get false positives or we would end-up relying too much on gradual typing. The other effort was to make sure we can lift as much information from pattern matching and guards.