Migrating from Webpack Encore to Vite with Reprise

We maintain a high-traffic project for one of our clients: 5 websites served by a single Symfony application, 800 Twig templates, and a React + Tailwind front end that has been built by Webpack Encore for years. A front-end build that was starting to weigh on us: over a minute of Webpack, a NODE_OPTIONS=--max_old_space_size=4096 to keep the heap from blowing up, a 200-line webpack.config.js driving two separate builds, and no hot reload for developers. Webpack Encore is reaching the end of its…