A mixture of things: 1. It doesn't fill a pressing need 2. It has foreign syntax 3. It's hard to tell if it has familiar semantics (due to #2) Credentials:

A mixture of things: 1. It doesn't fill a pressing need 2. It has foreign syntax 3. It's hard to tell if it has familiar semantics (due to #2) Credentials: I looked at some Erlang sample code twice and haven't looked at it again since; also, I'm no stranger to new languages, I fully adopted Clojure within a month of learning it