The only thing missing from this thread is someone saying “But Erlang was invented 100 years ago when it ran inside the same rack.”
I say give it a shot, see how it goes.
For mnesia there is GitHub - emqx/mria: Asynchronously replicated Mnesia-like database for Erlang/Elixir · GitHub, maybe that could scale better.
Also maybe of interest - GitHub - ostinelli/syn: A scalable global Process Registry and Process Group manager for Erlang and Elixir. · GitHub
Discord is using Elixir, they have some great blog articles on how they are scaling things.
