I’m not sure the complex problems these tools were originally created for still exist. For example, do you really need to support old browsers? If not, you probably don’t need a transpiler anymore.
Well, webpack has been replaced by vite (for those who pay attention to front-end trendfuckery) which is much simpler than Webpack and Babel is eliminated.
We are still not quite at the point where it’s practical to not have a module bundler. Handling things like imports etc is still necessary.
But we are moving away from React. Things are slowly going back to sanity. SvelteKit is an excellent step in this direction IMO.