I'm sure they could have done everything in Erlang, but they mentioned that they...

getsat on June 20, 2011 | parent | context | favorite | on: Erlang and First-Person Shooters in online games [...

I'm sure they could have done everything in Erlang, but they mentioned that they only have four developers that do Erlang within the company. Erlang developers aren't as prevalent as Python/Ruby developers.