Solves it in the same sense that it's a giant lockfile. It doesn't solve the other half where updates can horribly break your system and you run into transitive version clashes.
It solves it in the sense that it empowers the devs to update their dependencies on their own time and ops can update the underlying infrastructure fearlessly. It turned a coordination problem into a non-problem.
Having been running a VPS with manually maintained services moving to docker saved me a lot of headache... things definitely breaks less often (almost never) and if they do it's quite easy to revert back to previous version...
