On the surface this is about the pros and cons of minting a new HTML
search element to replace
div role="search" but there’s a deeper point which is that, while ARIA exists to the plug the gaps in HTML, the long-term goal is to have no gaps.
ARIA is not meant to replace HTML. If anything, the need to use ARIA as ‘polyfill’ for HTML semantics could be considered as a sign and a constant reminder of the fact that HTML falls short on some semantics that benefit users of assistive technologies.