Why does ReScript React use labeled arguments instead of props?

Or maybe your question is React-specific.

In JSX v4, you can use record types for sharing.

But still, labeled arguments can provide better ergonomics. It allows for co-locating type definitions and inference without having to duplicate declarations.

This is a feature that TypeScript people are really envious of, and is also a proposal for the Component DSL that Flow recently added.

• New Flow Language Features for React | by Alex Taylor | Flow | Medium
• Add Support for Flow's new component syntax · Issue #58246 · microsoft/TypeScript · GitHub

We’re already ahead of the curve