Turbopack is supposed to be coming, as a total rebuild of bundling. Rolldown seems solid, as a Rust roll-up redo.
I personally also think about it as a more-likely-to-make-it-to-production Haskell, with how robust the type system, tooling, and other things are (not to rag on Haskell -- it's a fantastic language and there's lots of overlap in the communities).
One of my favourite features is probably that it understands a tsconfig file: https://rsbuild.dev/config/source/tsconfig-path
Hopefully docusaurus gets on that train soon