You can still use Erlang style concurrency (or Go style as well) to truly parallelize CPU bound tasks. It’s a bit less efficient due to Erlangs design where you

You can still use Erlang style concurrency (or Go style as well) to truly parallelize CPU bound tasks. It’s a bit less efficient due to Erlangs design where you can’t readily share mutable data between processes but will still enable true parallel calculations on all cores. By default BEAM runs one execution thread per core. For example, it’d be trivial to write a true parallel merge sort in Erlang/Elixir. Now NodeJS or Python Asio style concurrency _are_ truly limited by their VMs and can’t do native parallel computations in a single process.