These do. C-Nodes are treated the same way the regular “Erlang nodes”. So these even works over network (additional advantage - you can run your Erlang application on simpler machine, and run Julia code on GPU-backed beast).
Absolutely not, this is why we have system supervisors like systemd. Erlang isn’t the best solution out there for managing external processes, especially when you run it as unprivileged user. This also solves problem of “unresponsive node” you mention.
No if Julia would for example hog RAM. From within Elixir you also cannot run application in cgroup or extensively limit it capabilities (as running Erlang VM as root is generally poor idea).
