The "containers are just XX Linux technology" comes regularly in the comments but it’s untrue: Windows containers are obviously not based on any Linux tech proper.
Also the overhead intuition exists for a reason: on both macOS and Windows when Linux containers are used, there is actually a whole VM running Linux underneath. And Windows containers come in two flavors, one being Hyper-V based, so again a VM tech comes in play.
So there are technical reasons why containers are "misunderstood", it’s because most people don’t run Linux natively, and on their stack containers are more than just cgroups and namespaces.
Also the overhead intuition exists for a reason: on both macOS and Windows when Linux containers are used, there is actually a whole VM running Linux underneath. And Windows containers come in two flavors, one being Hyper-V based, so again a VM tech comes in play.
So there are technical reasons why containers are "misunderstood", it’s because most people don’t run Linux natively, and on their stack containers are more than just cgroups and namespaces.