With respect, this suggests to me that you haven't actually read about how Vite works. It's not aiming to be just another contender, it sort of positions itself

With respect, this suggests to me that you haven't actually read about how Vite works. It's not aiming to be just another contender, it sort of positions itself as a "best of both worlds" abstraction layer on other tools, whereby esbuild is used for faster compilation and rollup is used for configurable builds. It's not as drastic of a change as you're making it out to be, unless someone is coming from like a Gulp-based setup or something. My work uses Webpack 3 and 4 (in a monorepo) and I was able to get Vite up and running on a test branch (as a sandbox) within a day, even though it's using roll-up instead of Webpack and even though our code was pretty old. It compiled in like a few seconds, it was wild.