> The article briefly mentions ReasonML, which offers a different syntax which aims to be more familiar to JavaScript programmers but is also likely to be more familiar to most programmers of C-family languages.

One thing I don't like about this is that they've replaced:

> let x = 1 in

with

> let x = 1;

In plain OCaml you only use semicolons on lines that evaluate to unit, so they're a clear indicator that you've done something with side effects. ReasonML loses this useful visual distinction in order to look more like JavaScript.