Some of these are decent points, but a couple are misleading. The security one is the big one. Things were just not as secure (and did not need to be as secure

Some of these are decent points, but a couple are misleading. The security one is the big one. Things were just not as secure (and did not need to be as secure) “back then”. K8s has a lot of complexity, and security should definitely be simpler so it’s harder to misconfigure, but not doing anything is not viable. Saying “Package Managers” is fine until you realise they solve only part of the problem. The mainstream ones are good tools to update package (and dependencies) from version X to Y. When you’re running a distributed system, it’s often not that simple if you want to be reliable. Coordinating a slow global update of your application from version X to Y (safely) is pretty tricky and I’m not aware of good self-contained solutions to this.