Why do concurrent languages tend to have more complicated syntax?

This is a question that’s been on my mind for a while.
Recently I’ve been checking out concurrent languages like Haskell or Go or Erlang.

Erlang function naming conventions

I understand the general Erlang conventions for functions are using snake case or camel case, but what about exported functions?

Erlang return value conventions

Should functions that return tuples, always return tuples?

Erlang chat app design?

I have a chat app made in node/socket.io.

Erlang chat app design?

I have a chat app made in node/socket.io.

Is Erlang really an actor model language?

I was reading this article:

Is Erlang really an actor model language?

I was reading this article:

Is Erlang really an actor model language?

I was reading this article:

Is Erlang really an actor model language?

I was reading this article: