This for me is THE reason for using container management. Without containers, you end up with hundreds of VMs. Then, when the time comes that you have to upgrade to a new OS, you have to go through the dance, for every service:

- set up new VMs

- deploy software on new VMs

- have the team responsible give their ok

It takes forever, and in my experience, often never completes because some snowflake exists somewhere, or something needs a lib that doesn't exist on the new OS. VMs decouple the OS from the hardware, but you should still decouple the service from the OS. So that means containers. But then managing hundreds of containers still sucks.

With container management, I just

- add x new nodes to cluster

- drain x old nodes and delete them