Elm vs ReasonML: What are the differences?

# Introduction
This markdown will outline the key differences between Elm and ReasonML.

1. **Syntax**: Elm has a more rigid syntax with a focus on simplicity and readability, while ReasonML offers more flexibility and is closer to traditional JavaScript syntax.
2. **Type System**: Elm has a simpler type system with strong static typing, while ReasonML provides a more complex type system with support for both static and dynamic typing.
3. **Frameworks and Ecosystem**: Elm has a smaller but more curated ecosystem with its own framework, while ReasonML can leverage the larger ecosystem of JavaScript libraries and frameworks.
4. **Compilation Target**: Elm compiles to JavaScript only, while ReasonML can target both JavaScript and native code with the help of BuckleScript.
5. **Immutability**: Elm enforces immutability by default, making it easier to reason about state changes, whereas ReasonML allows mutability but encourages immutability through its functional programming features.
6. **Community Support**: Elm has a dedicated and friendly community that focuses on simplicity and ease of use, while ReasonML's community is more diverse and includes developers from various backgrounds with different preferences and priorities.

In summary, Elm and ReasonML significantly differ in syntax, type system, ecosystem, compilation targets, approach to immutability, and community support.