[alerighi]

Any moderately complex frontend application already has to have some sort of build system. One common example is using TypeScript (and these days I don't see the point of using JavaScript and spending hours to fix bugs generated by its missing type safety), or using JSX syntax that must be transpiled, or even if you use plain JS, to transpile it to support older browsers (yes, there is still too much people using Internet Explorer to ignore it).

If you already have a build system, the most sensible thing to me is letting the build system do their stuff and not worry about it. When I write a web application in React with TypeScript (the setup that I usually use) I don't worry about dependencies, and I use the ES modules import syntax (that is better than the CommonJS one) that gets transpiled to CommonJS without I even notice. So why bother changing that? It works, it produces a minified and optimized single .js file that is easy to serve from a webserver, I don't see points against it.