If I'm interpreting these slides correctly, I see an interesting bit of irony as a Clojure programmer. I can't tell you how many times I've been asked about my opinions of Erlang and I've lost count of how many times I've been told to learn Erlang because company X needs Erlang, or I should learn about scaling NoSQL databases, or whatever perception.

As far as I can tell, Erlang may not have a visible mind-share, but it has a much higher impact on mind-share and companies than it appears. Of course, this may just because many people consider Erlang / Haskell / Clojure languages that solve similar problems and are thus diametrically opposed to each other.

One person told me about how he asked a bunch of Haskellers about Erlang. Their answer: "Why would we learn a language no one uses?"