Amusingly, SwiftUI seems much better suited to this use case than any other lower level language, while Elm and Clojure are much more obvious contenders. In any case, the space is crowded with DSLs and the expression-based DSLs are the ones that generally keep gaining traction.

The broken part is that it is worth it to use an inefficient rendering method (lots of JS generated by React + an interpreter and GC + a render tree (React VDOM) + an overcomplicated element tree (DOM) + a rendering system) instead of an efficient rendering system (if React-in-Rust existed, it would be native executables manipulating an in memory tree for a renderer, removing at least two layers of complications). And this seems to be simply because the React+JS model works so well for DX compared to the rest that it allows for way faster feature implementation.

I’ve been working on this :) https://dioxuslabs.com/