When "SharePoint Framework" was released, I was pretty sure that, sooner or later, Microsoft would host server side code in containers (http://fangdahai.blogspot.com.au/2016/05/the-future-of-sharepoint-development.html)
After a few days of testing the container feature on Windows Server 2016, I realised that it was never going to happen :-(
The installation media of SQL Server Express 2016 with SP1 is around 421 MB (64 bit). After put it into windows container, how much disk space it takes? 10 GB!
The post Windows Containers Compared: WinDocks vs. Microsoft is correct. There is something wrong with "Windows Container" by design. To me, "Windows Container" is more like "Windows Nano Server" virtual machine.