I mean, you can do this today right now. The "problem" is that many people rely on frameworks. Frameworks have dependencies, so you need something to manage the

I mean, you can do this today right now. The "problem" is that many people rely on frameworks. Frameworks have dependencies, so you need something to manage them. Then you need a way to make sure that you have no namespace collisions. You probably want to optimize your your build to not include code from libraries that you aren't using. Boom, you've recreated modern build tools.