We likely will not attempt to port the Erlang concurrency model to the browser, at least not to start. Some Gleam users have been experimenting with an actor model library in JavaScript, this could be the basis of future research.

More generally, Gleam doesn't have any concurrency primatives in the core language currently. We have a type safe OTP library, but it implemented in userland with a core of ~200 lines of Erlang rather than being built in to the compiler.