I've seen Elixir, Python, Javascript, Java, Scala, Clojure, C#, Go, and more; not sure who is at the top, but F# is 100% at the bottom (just in my personal experience.) I wouldn't chalk it up to being too approachable.
I did think F# had a pretty steep learning curve. So, not approachable. But how did it compare to Scala/Clojure? Those seem to have similar problem with being approachable, and adapted.
