What problem does this feature solve?

React 19 is already past its Alpha phase. During Alpha, libraries are encourage to start working on React 19 compatibility. This helps us flush out potential bugs before app developers start adopting React 19.

What does the proposed API look like?

At a glance, recharts and @headlessui/react are the libraries that are incompatible that stand out.

recharts@2.13.0-alpha.3 should fix most of the compat issues (already tracked in https://github.com/tremorlabs/tremor/issues/1054).

@headlessui/react had this compat issue: tailwindlabs/headlessui#3167. tailwindlabs/headlessui#3167 is already fixed on main. However, @tremor/react still uses 1.x so you'd need to bump @headlessui/react to 2.x first to have a chance of getting the fix for @headlessui/react.