I believe you're mistaken about this one:

> Automatic cancellation of requests that have taken too long. For example, in Erlang it is necessary for application programmers to explicitly code a time-out for each message send that might take too long.

https://hexdocs.pm/elixir/GenServer.html#call/3

> timeout is an integer greater than zero which specifies how many milliseconds to wait for a reply, or the atom :infinity to wait indefinitely. The default value is 5000. If no reply is received within the specified time, the function call fails and the caller exits.