For OS-level package management like Apt or Yum this is less of an issue, but for things like Composer, Gem, NPM and the like, is the concept of "closest availa

For OS-level package management like Apt or Yum this is less of an issue, but for things like Composer, Gem, NPM and the like, is the concept of "closest available mirror" even a thing? I guess for mission critical applications you could have a local mirror of all your vendor package dependencies (probably not a bad idea) but I would bet most people don't do that (I don't)..