I update my Erlang based ChicagoBoss / Cowboy web services live all the time, without one transaction being lost. Erlang lets you update live code, while it's

I update my Erlang based ChicagoBoss / Cowboy web services live all the time, without one transaction being lost. Erlang lets you update live code, while it's running. Still, I'm a big fan of Python and Django, and it's nice to see people realizing the value of "live" upgrades, even in a round-about way.