You can easily mirror LFS objects by just using

git lfs fetch --all

every modern git hosting servers now have support for LFS directly inside the git server (gitlab, github, gerrit to my knowledge)

This solve the authentication issue nicely so make it easy for developers.

git lfs starts to be adopted by vendors and becomes usable. It solves real problem when you are tired of having to double your git server CPUs every 6 months as your git upload packs are taking huge time trying to recompress those big files over and over.