THE WORLD'S LONGEST REACT HOOKS MIGRATION

Summary from the TLDR Web Dev newsletter

Faire completed a massive migration from React class components and MobX to functional components and hooks in 2025, despite hooks being released in 2019. The company delayed the migration after switching to MobX in 2018, but by 2022, its codebase had grown 5x larger while the team only doubled, creating maintainability issues with bloated "kitchen-sink" classes and performance problems from large bundle sizes and poor caching.