This isn't true though. npm chooses the first version of a package it encounters to install at the top level. Every other version is installed nested. If you h

This isn't true though. npm chooses the first version of a package it encounters to install at the top level. Every other version is installed nested. If you have N uses of version A and one use of version B, but version B is installed first, then you get N copies of the package at version A.