1) You've been running Docker for a few months. It could still be changing a lot, a few months is no proof one way or the other.

2) You are not running it in production. Poster is. All sorts of issues you don't care about on your dev box matter a lot in production.

IOW, your experience can best be summarized by "just trying out Docker in a totally different way and it works great!" Irrelevant to this post.