[a-saleh]

I think understood the Elm/Haskell/Purescript, i.e:

Javascript dev sees Elm and might think "Wow,a type-system and it is awesome, didn't expect that"

Haskell dev sees Elm and might think "I am missing so many features with these types" and consider something else, probably pure-script, that has similar toolbelt.

Not sure about the rest though.