On the one hand, something like Docker/Kubernetes offers fine-grained resource control that nothing else can match; on the other hand, this is an advanced optimization that very few companies actually need. Last year I had several clients who nearly destroyed themselves by over-investing in infrastructure setups that were excessive to their needs, so out of frustration I wrote this essay that listed all of the ways Docker/Kubernetes was excessive for nearly all of my clients:

http://www.smashcompany.com/technology/my-final-post-regardi...