I don't follow. The notion put forward was "hey people who like haskell, stop improving haskell and start adding visual studio support or else $BIGCORP won't use haskell". Nobody cares if $BIGCORP uses haskell, they are free to cripple themselves if they want. If $BIGCORP actually seriously wanted to use haskell, they could afford to pay someone to add visual studio support for haskell.