It could have been clearer that the author is advocating containers as an alternative to virtual machines for isolating your apps from other users on shared ser

It could have been clearer that the author is advocating containers as an alternative to virtual machines for isolating your apps from other users on shared servers. For some reason a lot of other people are advocating containers to isolate your apps from each other on your own server (or VM); there's very little reason to do that unless you have a bunch of poorly managed apps with incompatible dependences which didn't come from your .rpm or .deb library.