Context: React Compiler 1.0 shipped in October 2025 and is the most-anticipated React feature among developers (62% excitement in State of React 2025 survey). It eliminates the need for manual `useMemo`, `useCallback`, and `React.memo` usage by automatically optimizing re-renders at compile time. Next.js 16 supports the compiler via `reactCompiler: true` in `next.config`. None of the starters currently enable it.
Steps:
1. Complete the Next.js 16 upgrade first.
2. In one starter (suggest `basic-nextjs` for simplicity), add `reactCompiler: true` to `next.config`.
3. Run `npm run build` and verify no compilation errors.
4. Run the test suite and verify no behavioral changes.
5. Measure bundle size before and after with `next build --profile`.
6. If results are positive, enable in all starters.
Acceptance criteria:
React Compiler evaluated with documented results (bundle size, build time, runtime perf)
Decision made: enable by default or defer with documented reasoning
If enabled, all starters have `reactCompiler: true`
Risks: React Compiler may not correctly optimize all component patterns, especially those with complex side effects or dynamic imports. The Sitecore component map pattern needs specific validation.