If the point of storybook is to build reusable components, then where are all these reusable components? Locked away in private companies?
Shouldn't there be marketplaces/free collections of reusable components?
Do I just suck at googling?
The point of storybook is to provide teams/projects a way to develop/view/test their components in an isolated environment. It is a component catalog builder that use provided components to build himself.
If you're asking for a reusable (free) components "marketplace" there's bit.dev but its not related to storybook at all.