Hi, I am the author of the article. It does not state containers encapsulate applications from a 'security sense'. You make a point which is not stated to draw conclusions which were not made.

It states 'Containers decouple your applications from the host OS, abstracts it and makes it portable across any system that supports LXC'. You can run the app in the container in any other system that supports LXC, isn't that what decoupling is?

I think you are looking at this from a technical perspective and not an end user perspective. Why don't you download and try some of the Flockport containers available on the website, those apps are decoupled from your Linux OS and will work in any LXC environment.

This is an article about containers for end users, not technical users, to help them understand the concept of containers and how LXC differs from Docker.

If security, multi-tenancy, running other OS's or specific kernels are your core use cases, virtualization makes more sense as is stated a few paragraphs below that quote, and in the LXC getting started guide on the same site.