Why Mixpanel switched from Erlang to Python (readwriteweb.com)

"However, the team lacked an Erlang expert and the code became difficult to manage over time"

So I guess they had decided to go for Erlang because they had the expert ;)

Actual link (grrr): http://code.mixpanel.com/2011/08/05/how-and-why-we-switched-...