The difference is obvious. pip works on all os&#x2F;platforms. apt-get certainly doesn&#x27;t.<p>If I write a language and ask users to use their favorite package manager to fetch dependencies, I&#x27;m not going to build a big community because packages and their dependencies will not be shared across platforms, or each user will have to add some manifest for every package manager, or different repositories will have to be maintained for each platform ...<p>os package managers and language package managers ARE orthogonal.