So, who wants to cover Erlang or Scala?

Sadly, I know only two things about Erlang: it's the language that CouchDB is written in, and it implements pre-emptive multitasking internally: https://journal.dedasy... (https://journal.dedasys.com/2010/04/29/erlang-vs-node-js)

... unless you want me to talk about CouchDB...