a huge leap forward for advanced systems administration. - this is the one great misconception. How a user-level virtualization technology back from mainframe

a huge leap forward for advanced systems administration. - this is the one great misconception. How a user-level virtualization technology back from mainframe's era, reincarnated as FreeBSD jails years before solves the problem of, say, optimizing a "slowed down under heavy load" RDBMS server, via re-partirioning, profiling, reindexing, optimizing client's code, which, in my opinion has something to do with "advanced administration". But ok, nowadays we have new meaningless memes "orchestration", "provisioning", "containerization". What punks cannot grasp is that it absolutely doesn't matter how quickly and by which tool you will install some set of deb or rpm packages into some virtualized environment and run it. The real administration has nothing to do with this. It is all about adaptation to reality, data-folow analysis and fine tuning.