> the downsides, like immutability making some algorithms impossible to implement F# like Ocaml has mutability. You can use references for local mutability and

> the downsides, like immutability making some algorithms impossible to implement F# like Ocaml has mutability. You can use references for local mutability and if it makes your code easier to write or more clear no one will bat an eye. Immutability seems to me as mostly an Haskell obsession. ML languages have always been very pragmatic on this matter.