Memory Leak in useEffect with Cleanup Functions

I'm encountering memory leaks when using useEffect with cleanup functions in React 18. The cleanup doesn't seem to run properly in certain edge cases, particularly when components unmount during Suspense boundaries. This is causing accumulation of event listeners and timers. Anyone else seeing this?

React DevTools Extension Crashes with Large Component Trees

The React DevTools extension consistently crashes when inspecting applications with large component trees (1000+ components). This makes debugging production applications nearly impossible. The extension needs better performance optimization for complex applications.

Hydration Mismatch Errors Too Cryptic

Hydration mismatch errors in React 18 are extremely difficult to debug. The error messages don't provide enough context about where the mismatch occurred or what caused it. This makes fixing SSR issues very time-consuming. Better error messages with component traces would be invaluable.