Slate v2 React 19.2 cleanup should remove forwardRef, not selection layout effects

Problem

After the React 19.2 convergence slice, parts of slate-react still used React 18-era forwardRef wrappers, ref as any, and one-shot useMemo construction.

That made the runtime posture inconsistent.

The trap was assuming every old-looking React pattern should be deleted in the same pass.

Solution

Clean up the actual compatibility debt:

• replace forwardRef wrappers with plain React 19 ref props
• remove memo(forwardRef(...)) wrappers when they are just structural noise
• replace one-shot useMemo(() => createEditor(), []) with lazy useState

Do not delete the patterns that still earn their keep:

• selection-sync useLayoutEffect in Editable
• benchmark-backed React.memo(...) on EditableDescendantNode

Why This Works

React 19.2 cleanup is about removing compatibility scaffolding, not about flattening every advanced pattern into the same style.

forwardRef and fake constructor useMemo are historical baggage here.

useLayoutEffect and the descendant memo wall are not. They still defend real correctness and performance seams.

Reusable Rule

For React 19-only cleanup in slate-v2:

• kill forwardRef
• kill ref as any
• kill one-shot constructor useMemo
• keep layout effects that synchronize DOM selection before paint
• keep memoization that is already benchmark-backed