Education, primarily * . It is the simplest in the family that includes Rust, Haskell, Scala, OCaml, Swift, F#, Elm, etc. So it makes an excellent environment f

Education, primarily * . It is the simplest in the family that includes Rust, Haskell, Scala, OCaml, Swift, F#, Elm, etc. So it makes an excellent environment for learning the foundational concepts of this family. In particular, you can find your ground first before you're forced to reckon with implicits (Scala) type classes/traits (Haskell, Rust, Scala), macros (Rust), etc. I do some sporadic, long-term work on Ponyo [0] to provide a base for exploration. I've also got a WIP "ebook" [1] on Standard ML. * Although it's also used for prototyping. A lot of Google and Facebook projects were prototyped in SML or OCaml such as React, Reason, certain WASM components, etc. [0] https://github.com/eatonphil/ponyo https://github.com/eatonphil/ponyo [1] http://ponyo.org/guides http://ponyo.org/guides