Like Wikipedia tries to catalogue all useful knowledge in the world, a standard library should catalogue all useful modules in the world. The problem is that tools and community structures we have are not advanced enough to support that workflow yet. E.g., it's difficult to see how you could put PyTorch into Python's standard library and have all developers happy with that. But it would make a lot of "meta" issues easier, such as release management, consistent documentation, community relations, etc.