My interest in ReScript is that it doesn't aim to add more features to JavaScript, it's a completely different language which has a JavaScript-like interface and compiles to JavaScript.

It's a statically-typed functional language from the ML family, which is a huge deal. It implements a completely different approach to code, even if it looks similar.

It's currently academical, "ivory tower," but in my opinion it will trickle into industry. Someone described ReScript as ECMAScript 2030.