The measure of a programming language isn't whether it becomes "mainstream." It's whether it can be used to make useful programs. Others have already provided m

The measure of a programming language isn't whether it becomes "mainstream." It's whether it can be used to make useful programs. Others have already provided many examples of useful Haskell programs (none of which are "yet another compiler"), so I'm not sure what else needs to be said. By the way, I don't know Haskell, but I am writing this comment from XMonad. :)