This is called a strawman, you're suggesting people use 3 different versions of webpack and another bundler at the same time?

Real talk, this is the modern stack:

If you want to write a simple animation or calculation on a: Javascript. Nothing else.

You have several behaviors on your page and and to use modern code practices: Babel. That's it.

You want a complicated Web app with Rich functionality on several pages: React, Webpack, Babel. That's it.

Typescript can replace Babel, if you like strong typing.