A seasoned developer argues that React itself isn't slow—it's the architecture built on top of it. Poor component structure, unnecessary re-renders, and tangled state management are the real culprits. React's design exposes bad patterns, making it easy to blame the framework instead of addressing flawed application design.

Common mistakes include massive components doing too much, prop drilling chaos, and global state abuse. These choices trigger excessive re-renders and slow down applications. The solution isn't switching frameworks but improving component boundaries, colocating state, and using composition over configuration for better performance and maintainability.

Good architecture involves clear component responsibilities, smart versus dumb components, and minimizing re-renders. Developers should measure performance first, then optimize surgically. React's tools like useMemo and React.memo are trade-offs, not magic fixes. The key is understanding rendering principles and building with intention, not cargo-culting patterns.