[cmrdporcupine]

FWIW among PL nerds Erlang was "cool" in 2000 to 2007, too. It was constantly talked about on Lambda The Ultimate, I would have loved to have used it at my work at the time... I saw it used at multiple startups in the 2008-2010 period, and it eventually got deployed for the backend of Facebook's initial Messenger version, among other places.

If anything, it fell out of favour and lost hype wave for some time after that, while other languages copied aspects of the Actor model... and mostly the BEAM hype came back in the form of Elixir.