Once you grok the language you can easily model the type of situations that they find awkward. For example in erlang/elixir you can keep game state in a series

Once you grok the language you can easily model the type of situations that they find awkward. For example in erlang/elixir you can keep game state in a series of processes. You model the state changes based on messages that a process receives, and you can spawn/terminate processes as needed. Everything he described as challenging is trivial if you understand the language paradigm.