Another reason to use k8s is the original:

When you deploy on physical hardware, not VMs, or have to otherwise optimize maximum utilization out of gear you have.

Especially since sometimes Cloud just means hemorrhaging money in comparison to something else, especially with ASGs

We found that the savings from switching from VMs in ASGs to k8s never really materialized. OS overhead wasn't actually that much and once you're requesting cpu / memory you can't fit as many pods per host as you think.

Plus you're competing with hypervisors for maxing out hardware which is rock solid stable.