The current dominant toolchain has been very stable for years now, and is much better than the mess of Webpack/Rollup/Brunch/Grunt/Gulp/Bower/Browserify/Parcel/Snowpack/Turbopack/Babel/etc/etc.
The only problem is that NOW there are too many separate different tools that aren't bundlers, so in addition to Vite one also has to configure Prettier, Eslint, Vitest, Typescript, Husky, Lint-Staged, Playwright, DotEnv, what else?
A unified toolchain might not replace each and every tool above, but it will simplify a lot of this process.
It will also simplify migrating between tools that it doesn't intend to replace, like migrating between Typescript and Typescript-Go. Etc.
This is already the reality in Go, Rust and other languages.