Both Haskell and Scala are more popular than Rust right now. Scala is actually on its way to become a mainstream language (http://sogrady-media.redmonk.com/sogr

Both Haskell and Scala are more popular than Rust right now. Scala is actually on its way to become a mainstream language (http://sogrady-media.redmonk.com/sogrady/files/2014/01/lang-rank-114-wm.png http://sogrady-media.redmonk.com/sogrady/files/2014/01/lang-...), followed quite closely by Haskell.