My jaw actually dropped when they said &quot;they used a programming language called Haskell.&quot;<p>Were all my prejudices against the business practicality of functional languages wrong?<p>Nope.<p>&quot;Biilmann no longer uses Haskell. It’s not entirely practical.&quot;<p>EDIT: ... and to say, if Facebook can&#x27;t attract superstar Haskell programmers, then what chance any other startup?