Thank you for your comment! You’re absolutely right—React 19 introduces advancements like React Cache and other performance optimizations that might reduce the need for manual performance tweaks, including useMemo, in certain cases.

However, I believe useMemo still holds value in specific scenarios where fine-grained control over memoization is required. For example:

Expensive Calculations: If you have computationally heavy operations that depend on changing props or state, useMemo ensures these calculations only run when necessary.

Dependency Control: While newer features automate optimizations, developers might still need explicit control in edge cases or custom hooks.

It’s exciting to see how React continues to evolve! I’d love to hear more about your experiences with React 19 and if there are specific scenarios where you’ve found useMemo obsolete—or perhaps replaced by better patterns. Let’s discuss! 😊