> Python: ~60% waste (Mostly sized for startup spikes, then idles empty).

I understand we're talking about CPU in case of Python and memory for Java and Go. While anxious overprovisioning of memory is understandable, doing the same for CPU probably means lack of understanding of the difference between CPU limits and CPU requests.

Since I've been out of DevOps for a few years, is there ever a reason not to give each container the ability to spike up to 100% of 1 core? Scheduling of mass container startup should be a solved problem by now.