[llcooliovice]

> If the Records and Tuples proposal were progressing, JSX could maybe create Records with boxes, but that proposal has been stalled, especially on the record identity and box parts that would make it suitable for a JSX semantics.

That proposal hasn’t just stalled, it’s been withdrawn. https://github.com/tc39/proposal-record-tuple/issues/394

It has been replaced by https://github.com/tc39/proposal-composites