It may well be a misconception on my part - I assumed that as such message passing is such a core feature of using Erlang for distributed systems one should be able to treat it as a low-cost operation.
You can generally, just Discord is getting to a level of scale where the issue has more to do with architecture than language. All of their solutions in this post were Elixir-based solutions, and have very clean, easy APIs(and so far not very much code- all those libraries that solved their problems came out to ~400 LOC).
I guess the message here is, "There's never a magic bullet, but you've got everything you need to make yours."
