ReasonML has more potential. Aside from its excellent type system (one of the best), it can also compile to native code. This has several benefits:
- Frontend: Your tools are fast. The ReasonML-to-JS compiler is already an order of magnitude faster that TypeScript, etc. Fastpack is a native bundler in the works that aims to bundle your project in under a second (and faster for incremental builds).
- Mobile & Desktop: Some are experimenting right now with writing a version of React in pure Reason that compiles to native code, bypassing the JavaScript runtime entirely.
- Backend: You'll be able to use the Node.js ecosystem but compile certain modules to native code when you need critical performance.
Edit: I should add, the Node.js backend story is currently the least developed part of the ecosystem (I'm personally working on getting that up to speed).
- Frontend: Your tools are fast. The ReasonML-to-JS compiler is already an order of magnitude faster that TypeScript, etc. Fastpack is a native bundler in the works that aims to bundle your project in under a second (and faster for incremental builds).
- Mobile & Desktop: Some are experimenting right now with writing a version of React in pure Reason that compiles to native code, bypassing the JavaScript runtime entirely.
- Backend: You'll be able to use the Node.js ecosystem but compile certain modules to native code when you need critical performance.
Edit: I should add, the Node.js backend story is currently the least developed part of the ecosystem (I'm personally working on getting that up to speed).