[kube-system]

System memory DRAM never is, but sometimes DRAM is technically included on CPU dies as a cache

https://en.wikipedia.org/wiki/EDRAM

[wtallis]

It's mostly an IBM thing. In the consumer space, it's been in game consoles with IBM-fabbed chips. Intel's use of eDRAM was on a separate die (there was a lot that was odd about those parts).