[txcwpalpha]

I think you're conflating package managers and package registries here. This GitHub product has almost no overlap with package managers like pip, gem, maven, or npm. It is not a replacement for docker.

This is a replacement for npmjs.com (the hosting service, which is not the same thing as npm the package manager), or for rubygems.org (again, the hosting service, not the gem tool), or for Docker Hub.

If anything, this may actually improve the collaboration between package manager developers because there will now be a large development team that will be working with the backend of various package registries and will have better insight into what each one is doing wrong and what each one is doing right.