The Erlang VM lets you move actors from your local computer to a different cluster transparently for the caller. The author seems to be thinking it can be tran

The Erlang VM lets you move actors from your local computer to a different cluster transparently for the caller. The author seems to be thinking it can be transparent at the method call site, but it’s not really the case: when executed locally, pure functions are guaranteed to return (unless hardware limitations), while remote execution necessarily brings the network issues with it; pure functions could now fail for network reasons, but only when running elsewhere. Erlang works around this by forcing you to think of calls to actors as messages and to deal with all the network issues that come with it: works both locally and non locally.